ENTRY            C2541   20200501                             C196C254100000001 
SUBENT        C2541001   20200501                             C196C254100100001 
BIB                 10         22                                 C254100100002 
TITLE      New isotope 242Bk                                      C254100100003 
AUTHOR     (K.E.Williams,G.T.Seaborg)                             C254100100004 
REFERENCE  (J,PR/C,19,1794,1979)                                  C254100100005 
           #doi:10.1103/PhysRevC.19.1794                          C254100100006 
INSTITUTE  (1USABRK,1USAUCX)                                      C254100100007 
FACILITY   (CYCLO,1USABRK) 88-inch cyclotron at the Lawrence      C254100100008 
           Berkeley Laboratory.                                   C254100100009 
DETECTOR   (SIBAR) Alpha particles were measured with 300-mm2     C254100100010 
           goldplated surface barrier detectors.                  C254100100011 
PART-DET   (A,XR)                                                 C254100100012 
METHOD     (CHSEP,ASPEC,XSPEC) Immediately following the          C254100100013 
           irradiation, the catcher foil was dissolved in hot 8M  C254100100014 
           HNO, in the presence of Hg+2. The berkelium products   C254100100015 
           were oxidized to +4 using CrO, and were extracted      C254100100016 
           into bis (2-ethylhexyl) orthophosphoric acid (HDEHP)   C254100100017 
           in n- dodecane. The berkelium products were plated on  C254100100018 
           1-inch diameter platinum disks for x-ray, gamma,       C254100100019 
           and/or alpha counting. The time from the end of the    C254100100020 
           bombardment (eob) to the start of counting was 12-14   C254100100021 
           min with a chemical yield of 50%.                      C254100100022 
DECAY-DATA (97-BK-242,7.0MIN,EC) Measured by authors.             C254100100023 
HISTORY    (20200501C) BP                                         C254100100024 
ENDBIB              22          0                                 C254100100025 
NOCOMMON             0          0                                 C254100100026 
ENDSUBENT           25          0                                 C254100199999 
SUBENT        C2541002   20200501                             C196C254100200001 
BIB                  4         10                                 C254100200002 
REACTION   (92-U-235(5-B-11,4N)97-BK-242,,SIG)                    C254100200003 
SAMPLE     (92-U-235,ENR=0.941) The targets were prepared by      C254100200004 
           electrospraying the nitrates dissolved in acetone      C254100200005 
           onto 1-mil thick beryllium backing foils kept at       C254100200006 
           250C. The 0.5-cm2 area targets were heated to red      C254100200007 
           heat in an induction furnace to ensure conversion of   C254100200008 
           the target material to the oxides. The typical target  C254100200009 
           thickness was 400 microg/cm2.                          C254100200010 
ERR-ANALYS (DATA-ERR) No details on sources of uncertainties.     C254100200011 
STATUS     (CURVE) Fig. 4, page 1796.                             C254100200012 
ENDBIB              10          0                                 C254100200013 
NOCOMMON             0          0                                 C254100200014 
DATA                 4          4                                 C254100200015 
EN         EN-ERR     DATA       DATA-ERR                         C254100200016 
MEV        MEV        MICRO-B    MICRO-B                          C254100200017 
     54.973      1.567  3.949E+00  1.552E+00                      C254100200018 
     59.946      1.226  1.019E+01  1.918E+00                      C254100200019 
     61.240      1.226  3.684E+00  1.531E+00                      C254100200020 
     64.510      1.431  7.445E-01  2.512E-01                      C254100200021 
ENDDATA              6          0                                 C254100200022 
ENDSUBENT           21          0                                 C254100299999 
SUBENT        C2541003   20200501                             C196C254100300001 
BIB                  4         11                                 C254100300002 
REACTION   (90-TH-232(7-N-15,5N)97-BK-242,,SIG)                   C254100300003 
SAMPLE     The thorium isotopes were present in natural           C254100300004 
           abundance. The targets were prepared by                C254100300005 
           electrospraying the nitrates dissolved in acetone      C254100300006 
           onto 1-mil thick beryllium backing foils kept at       C254100300007 
           250C. The 0.5-cm2 area targets were heated to red      C254100300008 
           heat in an induction furnace to ensure conversion of   C254100300009 
           the target material to the oxides. The typical target  C254100300010 
           thickness was 400 microg/cm2.                          C254100300011 
ERR-ANALYS (DATA-ERR) No details on sources of uncertainties.     C254100300012 
STATUS     (CURVE) Fig. 5, page 1796.                             C254100300013 
ENDBIB              11          0                                 C254100300014 
NOCOMMON             0          0                                 C254100300015 
DATA                 4          5                                 C254100300016 
EN         EN-ERR     DATA       DATA-ERR                         C254100300017 
MEV        MEV        MICRO-B    MICRO-B                          C254100300018 
     76.160      1.277  2.670E+00  4.718E-01                      C254100300019 
     82.995      1.113  9.110E+00  1.097E+00                      C254100300020 
     85.308      0.989  7.594E+00  1.069E+00                      C254100300021 
     88.583      1.359  4.192E+00  1.012E+00                      C254100300022 
     91.400      1.236  2.580E+00  7.832E-01                      C254100300023 
ENDDATA              7          0                                 C254100300024 
ENDSUBENT           23          0                                 C254100399999 
SUBENT        C2541004   20200501                             C196C254100400001 
BIB                  5         15                                 C254100400002 
REACTION   (92-U-235(5-B-11,X)ELEM/MASS,,SIG)                     C254100400003 
SAMPLE     (92-U-235,ENR=0.941) The targets were prepared by      C254100400004 
           electrospraying the nitrates dissolved in acetone      C254100400005 
           onto 1-mil thick beryllium backing foils kept at       C254100400006 
           250C. The 0.5-cm2 area targets were heated to red      C254100400007 
           heat in an induction furnace to ensure conversion of   C254100400008 
           the target material to the oxides. The typical target  C254100400009 
           thickness was 400 microg/cm2.                          C254100400010 
METHOD     (CHSEP) Curium and americium were chemically           C254100400011 
           separated from the catcher foil and the final          C254100400012 
           chemical fraction was analyzed for the emission of     C254100400013 
           both gamma rays and alpha particles.                   C254100400014 
FLAG       (1.) 242Am beta- decay.                                C254100400015 
           (2.) 242Bk EC, 242Am beta- decay.                      C254100400016 
STATUS     (TABLE) Table I, page 1798.                            C254100400017 
ENDBIB              15          0                                 C254100400018 
COMMON               1          3                                 C254100400019 
EN                                                                C254100400020 
MEV                                                               C254100400021 
       60.0                                                       C254100400022 
ENDCOMMON            3          0                                 C254100400023 
DATA                 4          8                                 C254100400024 
ELEMENT    MASS       DATA       FLAG                             C254100400025 
NO-DIM     NO-DIM     MICRO-B    NO-DIM                           C254100400026 
       95.0      238.0        1.6                                 C254100400027 
       95.0      239.0      410.0                                 C254100400028 
       95.0      240.0     1500.0                                 C254100400029 
       96.0      240.0      0.035                                 C254100400030 
       96.0      242.0       68.0         1.                      C254100400031 
       96.0      242.0       78.0         2.                      C254100400032 
       97.0      242.0       10.0                                 C254100400033 
       97.0      243.0        1.0                                 C254100400034 
ENDDATA             10          0                                 C254100400035 
ENDSUBENT           34          0                                 C254100499999 
SUBENT        C2541005   20200501                             C196C254100500001 
BIB                  5         15                                 C254100500002 
REACTION   (92-U-238(5-B-10,X)ELEM/MASS,,SIG)                     C254100500003 
SAMPLE     (92-U-235,ENR=0.999) The targets were prepared by      C254100500004 
           electrospraying the nitrates dissolved in acetone      C254100500005 
           onto 1-mil thick beryllium backing foils kept at       C254100500006 
           250C. The 0.5-cm2 area targets were heated to red      C254100500007 
           heat in an induction furnace to ensure conversion of   C254100500008 
           the target material to the oxides. The typical target  C254100500009 
           thickness was 400 microg/cm2.                          C254100500010 
METHOD     (CHSEP) Curium and americium were chemically           C254100500011 
           separated from the catcher foil and the final          C254100500012 
           chemical fraction was analyzed for the emission of     C254100500013 
           both gamma rays and alpha particles.                   C254100500014 
FLAG       (1.) 242Am beta- decay.                                C254100500015 
           (2.) 242Bk EC, 242Am beta- decay.                      C254100500016 
STATUS     (TABLE) Table I, page 1798.                            C254100500017 
ENDBIB              15          0                                 C254100500018 
COMMON               1          3                                 C254100500019 
EN                                                                C254100500020 
MEV                                                               C254100500021 
       67.0                                                       C254100500022 
ENDCOMMON            3          0                                 C254100500023 
DATA                 4          4                                 C254100500024 
ELEMENT    MASS       DATA       FLAG                             C254100500025 
NO-DIM     NO-DIM     MICRO-B    NO-DIM                           C254100500026 
       96.0      240.0       0.12                                 C254100500027 
       96.0      242.0       51.0         1.                      C254100500028 
       96.0      242.0       60.0         2.                      C254100500029 
       97.0      242.0        8.9                                 C254100500030 
ENDDATA              6          0                                 C254100500031 
ENDSUBENT           30          0                                 C254100599999 
SUBENT        C2541006   20200501                             C196C254100600001 
BIB                  5         16                                 C254100600002 
REACTION   (90-TH-232(7-N-14,X)ELEM/MASS,,SIG)                    C254100600003 
SAMPLE     The thorium isotopes were present in natural           C254100600004 
           abundance. The targets were prepared by                C254100600005 
           electrospraying the nitrates dissolved in acetone      C254100600006 
           onto 1-mil thick beryllium backing foils kept at       C254100600007 
           250C. The 0.5-cm2 area targets were heated to red      C254100600008 
           heat in an induction furnace to ensure conversion of   C254100600009 
           the target material to the oxides. The typical target  C254100600010 
           thickness was 400 microg/cm2.                          C254100600011 
METHOD     (CHSEP) Curium and americium were chemically           C254100600012 
           separated from the catcher foil and the final          C254100600013 
           chemical fraction was analyzed for the emission of     C254100600014 
           both gamma rays and alpha particles.                   C254100600015 
FLAG       (1.) 242Am beta- decay.                                C254100600016 
           (2.) 242Bk EC, 242Am beta- decay.                      C254100600017 
STATUS     (TABLE) Table I, page 1798.                            C254100600018 
ENDBIB              16          0                                 C254100600019 
COMMON               1          3                                 C254100600020 
EN                                                                C254100600021 
MEV                                                               C254100600022 
       77.0                                                       C254100600023 
ENDCOMMON            3          0                                 C254100600024 
DATA                 4          5                                 C254100600025 
ELEMENT    MASS       DATA       FLAG                             C254100600026 
NO-DIM     NO-DIM     MICRO-B    NO-DIM                           C254100600027 
       95.0      240.0      200.0                                 C254100600028 
       96.0      240.0      0.055                                 C254100600029 
       96.0      242.0       0.52         1.                      C254100600030 
       96.0      242.0        1.0         2.                      C254100600031 
       97.0      242.0       0.48                                 C254100600032 
ENDDATA              7          0                                 C254100600033 
ENDSUBENT           32          0                                 C254100699999 
ENDENTRY             6          0                                 C254199999999