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Neutrino reactions on $$^{138}$$La and $$^{180}$$Ta via charged and neutral currents by the quasiparticle random-phase approximation

Cheoun, M. K.*; Ha, E.*; Hayakawa, Takehito; Kajino, Toshitaka*; Chiba, Satoshi

We investigate neutrino-induced reactions on heavy nuclei. Charged current (CC) reactions,$$^{138}$$Ba($$nu_e$$, $$e$$$$^-$$)$$^{138}$$La and $$^{180}$$Hf($$nu_e$$, $$e$$$$^-$$)$$^{180}$$Ta are calculated by a quasi-particle random phase approximation (QRPA) with pairing correlations. For neutral current (NC) reactions, $$^{139}$$La($$nu,nu'$$)$$^{139}$$La$$^*$$ and $$^{181}$$Ta($$nu,nu'$$)$$^{181}$$Ta$$^*$$, we generate ground and excited states of odd-even target nuclei, $$^{139}$$La and $$^{181}$$Ta, by operating one quasi-particle to even-even nuclei. Numerical results for CC reactions are shown to be consistent with recent semi-empirical data deduced from the Gamow-Teller strength distributions measured in the ($$^3$$He,$$t$$) reaction. Results for NC reactions are estimated to be smaller by a factor about 4 to 5 rather than those by CC reactions. Finally, cross sections weighted by the incident neutrino flux in the core collapsing supernova are presented for further applications to the network calculations for relevant nuclear abundances.



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Category:Physics, Nuclear



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