Excited states of odd-odd nucleus 92Nb and odd-A nucleus 93Nb were populated in the 6Li+ 89Y reaction with an incident energy of 34 MeV. The processes that produce 92,93Nb and can be measured by a combination of light...Excited states of odd-odd nucleus 92Nb and odd-A nucleus 93Nb were populated in the 6Li+ 89Y reaction with an incident energy of 34 MeV. The processes that produce 92,93Nb and can be measured by a combination of light charged particle and gamma ray measurements are discussed. Twenty new transitions are observed and eight new levels are constructed in 92Nb, and in addition two new transitions are added to the level scheme of 93Nb. Using shell model calculations, the low-lying structure of 92Nb is investigated and compared with the experimental results.展开更多
The breakup reactions of weakly-bound nuclei at energies around the Coulomb barrier and the cor- responding coupling effect on the other reaction channels are hot topics nowadays. To overcome the difficulty in identif...The breakup reactions of weakly-bound nuclei at energies around the Coulomb barrier and the cor- responding coupling effect on the other reaction channels are hot topics nowadays. To overcome the difficulty in identifying both heavier and lighter fragments simultaneously, a new kind of ionization-chamber based detector tele- scope has been designed and manufactured. It consists of a PCB ionization chamber and three different thickness silicon detectors installed inside the chamber, which form a multilayer △E-ER telescope. The working conditions were surveyed by using an a source. An in-beam test experiment shows that the detector has good particle identifi- cation for heavy particles like 17F and 160 as well as light particles like protons and alpha particles. The measured quasi-elastic scattering angular distribution and the related discussions for 17F＋208pb are presented.展开更多
基金Supported by National Natural Science Foundation of China(U1867210,11775098,11475013,U1832130 and 11775316)
文摘Excited states of odd-odd nucleus 92Nb and odd-A nucleus 93Nb were populated in the 6Li+ 89Y reaction with an incident energy of 34 MeV. The processes that produce 92,93Nb and can be measured by a combination of light charged particle and gamma ray measurements are discussed. Twenty new transitions are observed and eight new levels are constructed in 92Nb, and in addition two new transitions are added to the level scheme of 93Nb. Using shell model calculations, the low-lying structure of 92Nb is investigated and compared with the experimental results.
基金Supported by National Key Basic Research Development Program of China(2013CB834404)National Natural Science Foundation of China(11375268,11475263,U1432127,U1432246)
文摘The breakup reactions of weakly-bound nuclei at energies around the Coulomb barrier and the cor- responding coupling effect on the other reaction channels are hot topics nowadays. To overcome the difficulty in identifying both heavier and lighter fragments simultaneously, a new kind of ionization-chamber based detector tele- scope has been designed and manufactured. It consists of a PCB ionization chamber and three different thickness silicon detectors installed inside the chamber, which form a multilayer △E-ER telescope. The working conditions were surveyed by using an a source. An in-beam test experiment shows that the detector has good particle identifi- cation for heavy particles like 17F and 160 as well as light particles like protons and alpha particles. The measured quasi-elastic scattering angular distribution and the related discussions for 17F＋208pb are presented.
