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