Experimental study of α-induced reactions on 113In for the astrophysical p process

被引:0
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作者
Basak, Dipali [1 ,2 ]
Bar, Tanmoy [1 ,2 ]
Sahoo, Lalit Kumar [1 ,2 ]
Saha, Sukhendu [1 ,2 ]
Datta, Jagannath [3 ]
Dasgupta, Sandipan [3 ]
Roy, Abhijit [4 ]
Kinoshita, Norikazu [5 ]
Basu, Chinmay [1 ,2 ]
机构
[1] Saha Inst Nucl Phys, 1-AF Bidhannagar, Kolkata 700064, India
[2] Homi Bhabha Natl Inst, Mumbai 400094, India
[3] Bhabha Atom Res Ctr, Variable Energy Cyclotron Ctr, Analy Chem Div, 1-AF Bidhannagar, Kolkata 700064, India
[4] Aryabhatta Res Inst Observat Sci, Manora Peak 263001, Uttarakhand, India
[5] Shimizu Corp, Technol Inst, 3-4-17 Echujima,Koto Ku, Tokyo 1358530, Japan
关键词
CROSS-SECTIONS; NUCLEAR-PHYSICS; NUCLEOSYNTHESIS; ACTIVATION; PARTICLE; MODEL;
D O I
10.1103/PhysRevC.110.065807
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
Neutron deficient nuclei from 74Se - 196Hg are thought to be produced by gamma -induced reactions (gamma , n), (gamma , p), and (gamma , alpha) processes. The stacked foil activation method was used to measure the 113In(alpha, gamma ) reaction cross section at Elab = 8.29-17.78 MeV. 113In(alpha, n) reaction cross section was also measured at Elab = 9.80-17.78 MeV. 113In(alpha, gamma ) reaction cross section was measured for the first time at Elab = 8.29 +/- 0.76 MeV (a = 1.5 +/- 0.3 mu b). Vacuum evaporation technique was used for preparing the targets (60-85 mu g/cm2). Theoretical statistical model calculations were performed with different nuclear input parameters and compared with the experimental results. An appropriate alpha-optical potential has been identified from the (alpha, gamma ) and (alpha, n) fitting, which provides the major source of uncertainty in the statistical model calculations. The other nuclear input parameters, such as level density and gamma -ray strength function, were also constrained for theoretical calculations. 113In(alpha, gamma ) 117Sb and 117Sb(gamma , alpha) 113In reaction rates were calculated using best-fit input parameters.
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页数:10
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