High-spin states in I87Pt have been studied experimentally via the 173Yb(18O, 4n)187Pt reaction at beam energies of 78 and 85 MeV. The 18O beam was provided by the tandem accelerator at the Japan Atomic Energy Researc...High-spin states in I87Pt have been studied experimentally via the 173Yb(18O, 4n)187Pt reaction at beam energies of 78 and 85 MeV. The 18O beam was provided by the tandem accelerator at the Japan Atomic Energy Research Institute (JAERI). The target is an isotopically enriched 173Yb metallic foil of 2展开更多
We briefly reviewed the experimental study onβ-delayed proton decays near the proton drip line published by our group during the period of 1996-2004, namely the first observation of theβ-delayed proton decays of 9 n...We briefly reviewed the experimental study onβ-delayed proton decays near the proton drip line published by our group during the period of 1996-2004, namely the first observation of theβ-delayed proton decays of 9 new nuclides in the rare-earth region (Fig.1)and the new measurements ofβ-delayed proton decays of 5 nuclides in the mass≈90 region near the N = Z line (Fig. 2) with the aid of the 'p-γ'展开更多
We briefly reviewed the experimental study on a-delayed proton decays near the proton drip line published by our group during the period of 1996―2004,namely the first observation of the a-delayed proton decays of 9 n...We briefly reviewed the experimental study on a-delayed proton decays near the proton drip line published by our group during the period of 1996―2004,namely the first observation of the a-delayed proton decays of 9 new nuclides in the rare-earth region and the new measurements of a-delayed proton decays of 5 nuclides in the mass~90 region near the N=Z line with the aid of the“p-?”coincidence in combination with a He-jet tape transport system.In the meantime some important experimental technique details were supplemented.The experimental results,including the half-lives,spins,parities,deformations and production reaction cross sections for the 14 nuclei were summarized and compared with the current nuclear-model predictions,and then the following points were represented.(1)The experimental half-lives for 85Mo and 92Rh as well as the predicted“waiting point”nuclei 89Ru and 93Pd are 5―10 times longer than the theoretical predictions given by M?ller et al.using a macroscopic-microscopic model.It considerably influences the predictions of the abundances of the nuclides produced in the rp-process.(2)The current-model predictions are not consistent with the experimental assignments of the spins and parities for the proton drip-line nuclei 142Ho and 128Pm.However,the nuclear potential energy surface(PES)calculated by using a Woods-Saxon-Strutinsky method reproduced the experimental results.(3)The Alice code overestimated the production reaction cross sections of the studied 9 rare-earth nuclei by one order of magnitude or two,while HIVAP code overestimated them by one order of magnitude approximately.展开更多
文摘High-spin states in I87Pt have been studied experimentally via the 173Yb(18O, 4n)187Pt reaction at beam energies of 78 and 85 MeV. The 18O beam was provided by the tandem accelerator at the Japan Atomic Energy Research Institute (JAERI). The target is an isotopically enriched 173Yb metallic foil of 2
基金Supported by the National Natural Science Foundation of China (10375078 and 10475002)
文摘We briefly reviewed the experimental study onβ-delayed proton decays near the proton drip line published by our group during the period of 1996-2004, namely the first observation of theβ-delayed proton decays of 9 new nuclides in the rare-earth region (Fig.1)and the new measurements ofβ-delayed proton decays of 5 nuclides in the mass≈90 region near the N = Z line (Fig. 2) with the aid of the 'p-γ'
基金supported by the National Natural Science Foundation of China(Grant Nos.10375078 and 10475002)the Major State Basic Research Development Program(Grant No.G2000077402).
文摘We briefly reviewed the experimental study on a-delayed proton decays near the proton drip line published by our group during the period of 1996―2004,namely the first observation of the a-delayed proton decays of 9 new nuclides in the rare-earth region and the new measurements of a-delayed proton decays of 5 nuclides in the mass~90 region near the N=Z line with the aid of the“p-?”coincidence in combination with a He-jet tape transport system.In the meantime some important experimental technique details were supplemented.The experimental results,including the half-lives,spins,parities,deformations and production reaction cross sections for the 14 nuclei were summarized and compared with the current nuclear-model predictions,and then the following points were represented.(1)The experimental half-lives for 85Mo and 92Rh as well as the predicted“waiting point”nuclei 89Ru and 93Pd are 5―10 times longer than the theoretical predictions given by M?ller et al.using a macroscopic-microscopic model.It considerably influences the predictions of the abundances of the nuclides produced in the rp-process.(2)The current-model predictions are not consistent with the experimental assignments of the spins and parities for the proton drip-line nuclei 142Ho and 128Pm.However,the nuclear potential energy surface(PES)calculated by using a Woods-Saxon-Strutinsky method reproduced the experimental results.(3)The Alice code overestimated the production reaction cross sections of the studied 9 rare-earth nuclei by one order of magnitude or two,while HIVAP code overestimated them by one order of magnitude approximately.
