ENTRY 20065 20190909 22822006500000001 SUBENT 20065001 20190909 22822006500100001 BIB 14 57 2006500100002 TITLE Radiative capture in nickel and bismuth of neutrons in2006500100003 the MeV region 2006500100004 AUTHOR (I.Bergqvist, B.Lundberg, L.Nilsson, N.Starfelt) 2006500100005 REFERENCE (J,NP/A,120,161,1968) Graphs only. 2006500100006 (W,NILSSON,196901) Numerical values. 2006500100007 INSTITUTE (2SWDAE ,2SWDFOA) 2006500100008 FACILITY (VDG,2SWDAE ) 5.5 MeV Van de Graaff accelerator 2006500100009 INC-SOURCE (P-T) T(p,n)He-3 for the neutron energy range 2006500100010 0.9 - 4. MeV. 2006500100011 (D-D) D(d,n)T reaction for the energy range 2006500100012 4.7 - 8.3 MeV. 2006500100013 METHOD (GSPEC,TOF) Detection of gamma-rays The sample was 2006500100014 placed on the axis and inclined at an angle of 45 deg.2006500100015 with respect to the incident beam. 2006500100016 Time-of-flight techniques were used to improve the 2006500100017 signal to background ratio. 2006500100018 DETECTOR (NAICR) NaI crystal, 20.8 cm long, 22.6 cm diameter, 2006500100019 shielded and viewed by seven photomultipliers RCA 80542006500100020 (LONGC) long counter placed at 135 deg. to the ion-beam2006500100021 as monitor 2006500100022 ANALYSIS (4PI1A) 4pi*90 degree cross section value. 2006500100023 The area under the normalized response 2006500100024 function was used to determine the cross section for 2006500100025 neutron capture leading to the emission of a gamma-ray2006500100026 of the corresponding energy. 2006500100027 The cross section was determined by a straight-forward2006500100028 calculation using the integrated target beam current 2006500100029 and the gas pressure to obtain the neutron flux 2006500100030 COMMENT The given cross sections have been evaluated for high-2006500100031 energy gamma-ray transitions from capturing state to 2006500100032 low-lying states in the residual nuclei. 2006500100033 A comparison between these cross sections and calcul- 2006500100034 ations based on semi-direct capture theories shows 2006500100035 that the semi-direct capture processes are important 2006500100036 to explain the magnitude and energy variation of the 2006500100037 neutron capture cross section in the region of the 2006500100038 electric dipole giant resonance. 2006500100039 CORRECTION At each neutron energy several runs were performed 2006500100040 with sample in and sample out to reduce the influence 2006500100041 of small fluctuations in background and drift in the 2006500100042 electronic circuits. 2006500100043 Corrections due to neutron and gamma-ray attenuation 2006500100044 in the sample, to the attenuation of gamma-rays in 2006500100045 lithium hydride and lead placed in front of the 2006500100046 detector and to neutron multiple scattering in the 2006500100047 sample were calculated and taken into account. 2006500100048 ERR-ANALYS (ERR-T) The estimated total error 2006500100049 The dominating error in the cross section 2006500100050 originates from the unfolding calculation of the 2006500100051 gamma-ray spectra. 2006500100052 (ERR-1,,15.) The maximum total error resulting from the2006500100053 unfolding procedure was estimated never to exceed 2006500100054 15% for the highest gamma-ray peak. 2006500100055 STATUS (TABLE) Data from letter Nilsson 09/01/1969. 2006500100056 HISTORY (19700505T) From NEUDADA file 2006500100057 (20190909A) SD:Updated to new date formats,lower case. 2006500100058 BIB updated. DATA-ERR -> ERR-T. 2006500100059 ENDBIB 57 0 2006500100060 COMMON 1 3 2006500100061 ANG 2006500100062 ADEG 2006500100063 90. 2006500100064 ENDCOMMON 3 0 2006500100065 ENDSUBENT 64 0 2006500199999 SUBENT 20065002 20190909 22822006500200001 BIB 4 16 2006500200002 REACTION (28-NI-0(N,G),PAR,DA,,4PI) 2006500200003 COMMENT Cross section values for neutron capture in Ni-58 and 2006500200004 Ni-60, where the primary gamma rays go to levels of 2006500200005 Ni-59 and Ni-61 in the excitation energy ranges 2006500200006 0.9-2.0 MeV and 0.0-0.9 MeV, respectively. It is not 2006500200007 possible to conclude that the second peak in the gamma2006500200008 spectra is due entirely to capture in Ni-60, since 2006500200009 capture leading to levels around 1.5 MeV in Ni-59 may 2006500200010 contribute. For this reason no abundance correction 2006500200011 has been applied to the experimental values. 2006500200012 SAMPLE Natural nickel in the form of 15 cm diam., 2006500200013 1.5 cm thick disks. 2006500200014 HISTORY (19700505T) From NEUDADA file 2006500200015 (20190909A) SD: SF6=SIG -> DA, SF8=4PI in REACTION code2006500200016 DATA-ERR -> ERR-T. Free text under REACTION code 2006500200017 moved to COMMENT. 2006500200018 ENDBIB 16 0 2006500200019 COMMON 3 3 2006500200020 Q-VAL-MAX Q-VAL-MIN ERR-T 2006500200021 MEV MEV PER-CENT 2006500200022 8.1 7. 25. 2006500200023 ENDCOMMON 3 0 2006500200024 DATA 3 10 2006500200025 EN EN-RSL-HW DATA 2006500200026 MEV MEV B 2006500200027 0.90 0.05 1.40E-03 2006500200028 2.50 0.06 4.50E-04 2006500200029 4.00 0.09 1.25E-04 2006500200030 4.70 0.16 1.09E-04 2006500200031 4.70 0.16 1.71E-04 2006500200032 5.60 0.15 1.28E-04 2006500200033 6.30 0.15 5.30E-05 2006500200034 7.30 0.17 1.03E-04 2006500200035 8.20 0.20 1.04E-04 2006500200036 8.30 0.20 1.02E-04 2006500200037 ENDDATA 12 0 2006500200038 ENDSUBENT 37 0 2006500299999 SUBENT 20065003 20190909 22822006500300001 BIB 3 7 2006500300002 REACTION (28-NI-58(N,G)28-NI-59,PAR,DA,,4PI) 2006500300003 SAMPLE Natural nickel in the form of 15 cm diam., 2006500300004 1.5 cm thick disks. 2006500300005 HISTORY (19700505T) From NEUDADA file 2006500300006 (20190909A) SD: SF6=SIG -> DA, SF8=4PI; free text 2006500300007 deleted from REACTION code DATA-ERR -> ERR-T. 2006500300008 Q-VAL-MAX/MIN -> E-EXC-MAX. 2006500300009 ENDBIB 7 0 2006500300010 COMMON 2 3 2006500300011 E-EXC-MAX ERR-T 2006500300012 MEV PER-CENT 2006500300013 0.9 20. 2006500300014 ENDCOMMON 3 0 2006500300015 DATA 3 10 2006500300016 EN EN-RSL DATA 2006500300017 MEV MEV B 2006500300018 0.90 0.05 1.84E-03 2006500300019 2.50 0.06 5.15E-04 2006500300020 4.00 0.09 2.08E-04 2006500300021 4.70 0.16 2.04E-04 2006500300022 4.70 0.16 2.89E-04 2006500300023 5.60 0.15 2.78E-04 2006500300024 6.30 0.15 1.81E-04 2006500300025 7.30 0.17 3.76E-04 2006500300026 8.20 0.20 4.78E-04 2006500300027 8.30 0.20 4.60E-04 2006500300028 ENDDATA 12 0 2006500300029 ENDSUBENT 28 0 2006500399999 SUBENT 20065004 20190909 22822006500400001 BIB 3 7 2006500400002 REACTION (83-BI-209(N,G)83-BI-210,PAR,DA,,4PI) 2006500400003 SAMPLE Natural nickel in the form of 15 cm diam., 2006500400004 1.8 cm thick disks. 2006500400005 HISTORY (19700505T) From NEUDADA file 2006500400006 (20190909A) SD: SF6=SIG -> DA, SF8=4PI; free text 2006500400007 deleted from REACTION code DATA-ERR -> ERR-T. 2006500400008 Q-VAL-MAX/MIN -> E-EXC-MAX. 2006500400009 ENDBIB 7 0 2006500400010 COMMON 2 3 2006500400011 E-EXC-MAX ERR-T 2006500400012 MEV PER-CENT 2006500400013 0.6 20. 2006500400014 ENDCOMMON 3 0 2006500400015 DATA 3 5 2006500400016 EN EN-RSL DATA 2006500400017 MEV MEV B 2006500400018 4.70 0.16 3.47E-04 2006500400019 5.60 0.15 3.04E-04 2006500400020 6.30 0.15 2.64E-04 2006500400021 7.30 0.17 4.57E-04 2006500400022 8.30 0.20 4.31E-04 2006500400023 ENDDATA 7 0 2006500400024 ENDSUBENT 23 0 2006500499999 ENDENTRY 4 0 2006599999999