ENTRY O1399 20090312 O038O139900000001
SUBENT O1399001 20090312 O038O139900100001
BIB 14 64 O139900100002
TITLE Activation measurement of the He-3(He4,g)Be-7 cross O139900100003
section at low energy. O139900100004
AUTHOR (D.Bemmerer, F.Confortola, H.Costantini, A.Formicola, O139900100005
Gy.Gyurky, R.Bonetti, C.Broggini, P.Corvisiero, O139900100006
Z.Elekes, Zs.Fulop, G.Gervino, A.Guglielmetti, O139900100007
C.Gustavino, G.Imbriani, M.Junker, M.Laubenstein, O139900100008
A.Lemut, B.Limata, V.Lozza, M.Marta, R.Menegazzo, O139900100009
P.Prati, V.Roca, C.Rolfs, C.Rossi-Alvarez, E.Somorjai,O139900100010
O.Straniero, F.Strieder, F.Terrasi, H.P.Trautvetter) O139900100011
INSTITUTE (2ITYPAD) O139900100012
(2ITYGVA) O139900100013
(2ITYLGS) O139900100014
(3HUNDEB) O139900100015
(2ITYMIL) O139900100016
(2ITYTUR) O139900100017
(2ITYNAP) O139900100018
(2GERBOC) O139900100019
(2ITYOAC) O139900100020
(2ITYFSN) O139900100021
REFERENCE (J,PRL,97,122502,2006) O139900100022
(J,NP/A,814,144,2008) O1709 O139900100023
(J,PR/C,75,065803,2007) O1516 O139900100024
REL-REF (N,O1195001,G.IMBRIANI+,J,EPJ/A,25,455,2005) Results O139900100025
of LUNA group. O139900100026
(N,O1268001,B.N.SINGH+,J,PRL,93,262503,2004) Results O139900100027
of He-3(a,g)Be-7 reaction at GSPEC-method. O139900100028
SAMPLE Enriched He-3 gas, isotopic purity more than 99.95%, O139900100029
pressure 0.7-mbar, target thickness 9-10 keV, was used.O139900100030
DETECTOR (SOLST) A 100-mum thick silicon detector detects O139900100031
projectiles that have been elastically scattered first O139900100032
in the target gas and subsequently in a movable 15- O139900100033
mug/cm**2 carbon foil. O139900100034
(HPGE) The number of Be-7 nuclei is determined by O139900100035
measuring the Be-7 activity on a Cu-catcher. O139900100036
FACILITY (ACCEL,2ITYLGS) The 400 kV LUNA accelerator. O139900100037
The beam energy is obtained from a precision resistor O139900100038
chain and have 5 eV/hour long-term stability. O139900100039
METHOD (ACTIV) O139900100040
COMMENT *By authors*.The present data are the first activation O139900100041
results at energies directly relevant to Big-Bang O139900100042
Li-7 production. O139900100043
ERR-ANALYS (ERR-1).The error in Be-7 counting efficiency is 1.8%. O139900100044
(ERR-2).The error in beam intensity is 1.5%. O139900100045
(ERR-3).The error in beam heating effect is 1.3%. O139900100046
(ERR-4).The error in target pressure and temperature O139900100047
without beam is 0.6%. O139900100048
(ERR-5).The error in Be-7 backscattering is 0.5%. O139900100049
(ERR-6).The error in incomplete Be-7 collection is O139900100050
0.4%. O139900100051
(ERR-7).The error in Be-7 distribution in catcher is O139900100052
0.4%. O139900100053
(ERR-8).The error in 478-keV gamma-ray branching is O139900100054
0.4%. O139900100055
(EN-ERR,0.5,0.8).The error in effective energy is O139900100056
0.5-0.8%. O139900100057
(ERR-SYS).The total systematics errors is 3%. See O139900100058
above. O139900100059
(ERR-S).The errors due to statistics-activity O139900100060
measurements. O139900100061
MONITOR (13-AL-27(P,G)14-SI-28,,SIG) Catcher Al for back- O139900100062
scattered Be-7. O139900100063
HISTORY (20070123C) O139900100064
(20090312A) New referene was added. O139900100065
STATUS (TABLE) O139900100066
ENDBIB 64 0 O139900100067
COMMON 8 6 O139900100068
ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 O139900100069
ERR-7 ERR-8 O139900100070
PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT O139900100071
PER-CENT PER-CENT O139900100072
1.8 1.5 1.3 0.6 0.5 0.4O139900100073
0.4 0.4 O139900100074
ENDCOMMON 6 0 O139900100075
ENDSUBENT 74 0 O139900199999
SUBENT O1399002 20090312 O038O139900200001
BIB 3 6 O139900200002
REACTION 1(2-HE-3(A,G)4-BE-7,,SIG,,SFC) O139900200003
2(2-HE-3(A,G)4-BE-7,,SIG,,,DERIV) O139900200004
COMMENT *By authors*.The effective center mass energy is O139900200005
calculated assuming a constant S-factor over the targetO139900200006
length. O139900200007
STATUS (SPSDD,O1709002) O139900200008
ENDBIB 6 0 O139900200009
NOCOMMON 0 0 O139900200010
DATA 5 3 O139900200011
EN-CM DATA 1ERR-S 1ERR-SYS 1DATA 2 O139900200012
KEV B*KEV PER-CENT PER-CENT MB O139900200013
126.5 0.514 2. 3. 1.87E-06 O139900200014
147.7 0.499 1.7 2.9 4.61E-06 O139900200015
168.9 0.482 2. 2.9 9.35E-06 O139900200016
ENDDATA 5 0 O139900200017
ENDSUBENT 16 0 O139900299999
ENDENTRY 2 0 O139999999999