http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Kim Yung Hee (검색결과 2 건)
-
-
Kim Yung Hee 서울대학교 대학원 2015 국내박사
The neutron-rich isotopes far from stability, around the mass number A~200 forms the last waiting point of the r-process towards the synthesis of uranium. But, the difficulty of producing such nuclei with conventional methods, limited the current knowledge of such nuclides (e.g. half-life, mass, etc.) to the region close to the valley of stability. The multi-nucleon transfer (MNT) reaction recently attracts much attentions as the candidate to produce nuclides in this neutron-rich region. The MNT reactions with the combination of heavy neutron-rich projectile, such as 136Xe with target nucleus (e.g. 208Pb or 198Pt) is anticipated to have large cross sections for the producing neutron-rich target-like fragments (TLF's) [9, 14, 26]. However, the MNT reactions in such heavy systems have not been studied well. We performed an experiment using 136Xe+198Pt system with the beam energy 8MeV/u ( 55% above the Coulomb barrier). The large acceptance VAMOS++ spectrometer [83] and the EXOGAM Ge-detector array [96] at GANIL were used. First, to investigate the feasibility of the MNT reaction for producing neutron rich exotic nuclei. Second, to study reaction mechanism between heavy neutron-rich beam, and target with similar N/Z ratio. The event-by-event particle identification of projectile-like fragments (PLF's)were successfully carried out [119]. The cross sections of PLF, and TLF (calculated from information of PLF) will be presented, comparison with the GRAZING code [20] and TDHF [35] calculation. The evolution of reaction concerning nucleon transfer by moment analysis of correlation between mass and atomic number distribution(e.g. mean, width, and correlation of atomic number/mass distribution) will be discussed. This experimental result confirmed the MNT reaction between 136Xe+198Pt above the Coulomb barrier can produce neutron rich nuclides with N = 126 magic number for the first time. And observed neutron rich nuclides are produced from reaction with low excitation energy before N/Z-equilibrium is reached. This result will offer new possiblity to explore astronomically and nuclear physically important new territory of nuclear chart. And encourage new facilities that use MNT reactions for producing new isotope beam.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
