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arXiv 1409.0622nucl-th
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244- 252 Cm同位素的长程α粒子发射几率

The emission probabilities of long range alpha particles from even-even 244-252Cm isotopes

K. P. Santhosh, Sreejith Krishnan, B. Priyanka

摘要:

采用库仑势和邻近势之和作为相互作用势垒,研究了244 Cm、246 Cm、248 Cm、250 Cm和252 Cm同位素的α伴随冷裂变。从冷反应谷图和通过计算电荷最小化碎片的相对产率获得有利的碎片组合。在244 Cm同位素的α伴随三裂变中,最高产额的碎片组合是110 Ru +4 He +130 Sn,它们具有近双幻核130 Sn。对于以4 He为轻带电粒子的246 Cm、248 Cm、250 Cm和252 Cm同位素的三元裂变,以双幻核132 Sn为重碎片的碎片组合产额最高。计算了~(242)、~(244)、~(246)、~(248)Cm同位素的长程α粒子的发射几率和动能,与实验值符合较好。比较了4 He伴随的242- 252 Cm同位素的三次裂变(赤道和共线)的相对产额与相应的二次裂变产额。本文研究了~ 4 He伴随~(244)-~(252)Cm同位素三裂变中碎片的形变和取向效应。我们的研究揭示了基态形变在α伴随的三裂变中和壳效应一样起着重要的作用。

英文摘要:

The alpha accompanied cold ternary fission of even-even 244Cm, 246Cm, 248Cm, 250Cm and 252Cm isotopes have been studied by taking the interacting barrier as the sum of Coulomb and proximity potential with the fragments in equatorial configuration. The favorable fragment combinations are obtained from the cold reaction valley plot and by calculating the relative yield for the charge minimized fragments. In the alpha accompanied ternary fission of 244Cm isotope, the highest yield is found for the fragment combination 110Ru+4He+130Sn, which possess near doubly magic nuclei 130Sn. For the ternary fission of 246Cm, 248Cm, 250Cm and 252Cm isotopes with 4He as light charged particle, the highest yield is obtained for the fragment combination with doubly magic nuclei 132Sn as the heavier fragment. The emission probabilities and kinetic energies of long range alpha particle have been computed for the 242,244,246,248Cm isotopes and are found to be in good agreement with the experimental data. The relative yields for the 4He accompanied ternary fission (equatorial and collinear) of 242-252Cm isotopes are compared with the corresponding yield for binary fission. The effect of deformation and orientation of fragments in the 4He accompanied ternary fission of 244-252Cm isotopes are studied. Our study reveals that the ground state deformation has an important role in the alpha accompanied ternary fission as that of shell effect.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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