Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
浅井 雅人
no journal, ,
中性子過剰超フェルミウム原子核の対称核分裂の性質を調べるため、Fm,
Md,
Lrの自発核分裂片を測定した。これらの原子核は、原子力機構タンデム加速器施設において、
Oビームと
Es標的を用いた多核子移行反応及び重イオン核融合-粒子蒸発反応
Cm(
N,4n)
Lrにより合成した。核反応生成物はオンライン同位体分離装置ISOLを用いて質量分離し、4組のシリコン半導体検出器を用いて2つの核分裂片の運動エネルギーを同時計数測定した。得られた核分裂片の質量分布と全運動エネルギー分布から、中性子過剰超フェルミウム原子核における対称核分裂の詳しい性質を明らかにした。
西尾 勝久
no journal, ,
Multinucleon transfer (MNT) reaction is attracting interest as a method to produce neutron-rich heavy nuclei. In contrast to fusion reaction, the reaction process is complicated, and one needs to know the mechanism in detail to efficiently produce the nuclei of interest by optimizing the experimental conditions. Furthermore, there should be an optimal angle relative to the beam direction to detect evaporation residues (ERs). We have started an experimental program to study MNT reactions by separating ERs in flight using the Recoil Mass Separator (RMS), installed at the JAEA tandem facility. For the first time, we have separated the ERs produced in the MNT reaction in heavy-ion collisions at various angles, and the on-line alpha-decay measurement was carried out at the focal plane silicon detector. The experimental data will be discussed.