Effect of double spin-orbit parameters of spin-orbit strength in reactions involving spherical-prolate, spherical-oblate, oblate-prolate and oblate-oblate configurations

IF 1.7 4区物理与天体物理 Q2 PHYSICS, NUCLEAR Nuclear Physics A Pub Date : 2023-10-01 DOI:10.1016/j.nuclphysa.2023.122723

Rajni , Ashutosh Kaushik , Manoj K. Sharma , Ajay Kumar Rai

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Abstract

The present work is carried out to see the role of double spin-orbit parameters (W₁ and W₂) on reactions having spherical-prolate, spherical-oblate, oblate-prolate and oblate-oblate configurations. For the study, semi-classical Skyrme energy density formalism is used by employing SkIx (x=2,3,4) and SAMi Skyrme forces. The calculations suggest that the presence of double spin-orbit strength imparts significant influence on spin-dependent potential (V_J) as maximum barrier height of $V_{J}$ (V $_{J B}$ ) is observed with SAMi force (W₁≠W₂) and minimum with SkI2 (W₁=W₂) i.e., V $_{J B}$ $_{(S A M i)}$ >V $_{J B}$ $_{(S k I 4)}$ >V $_{J B}$ $_{(S k I 3)}$ >V $_{J B}$ $_{(S k I 2)}$ . The maxima and minima in $V_{J B}$ are further related to the contribution from the isoscalar and isovector parts of the spin-orbit potential. As far as shape of projectile and(or) target is concerned, the higher V $_{J B}$ is obtained for oblate-prolate configuration and lower when spherical-prolate configuration is used. The chosen Skyrme forces also modify the fusion barrier height V_B of different target-projectile combinations in the similar way as the spin-orbit barrier height (V $_{J B}$ ) does. These Skyrme forces are further applied to address the experimental fusion excitation functions and fusion barrier distributions of the considered reacting partners. The contribution of V_J is also estimated in fusion cross-section of considered reactions.

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双自旋轨道参数对球-长、球-扁、扁-长和扁-扁构型反应中自旋轨道强度的影响

本工作是为了观察双自旋轨道参数（W1和W2）对具有球面-长边、球面-扁边、扁边-长边和扁边-扁边构型的反应的作用。在这项研究中，通过使用SkIx（x=2,3,4）和SAMi-Skyrme力，使用了半经典的Skyrme能量密度形式。计算表明，双自旋轨道强度的存在对自旋相关势（VJ）产生了显著影响，因为在SAMi力（W1≠W2）下观察到VJ（VJB）的最大势垒高度，而在SkI2力（W1=W2）时观察到最小势垒高度，即VJB（SAMi）>；VJB（SkI4）>；VJB（SkI3）>；VJB（SkI2）。VJB中的最大值和最小值进一步与自旋轨道势的等标量和等矢量部分的贡献有关。就射弹和（或）目标的形状而言，扁长形时获得的VJB较高，而球形长形时则较低。所选择的Skyrme力也以与自旋轨道屏障高度（VJB）类似的方式修改不同目标-抛射体组合的聚变屏障高度VB。这些Skyrme力被进一步应用于所考虑的反应伙伴的实验聚变激发函数和聚变势垒分布。VJ的贡献也在所考虑的反应的聚变截面中进行了估计。

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来源期刊

Nuclear Physics A 物理-物理：核物理

CiteScore

3.60

自引率

7.10%

发文量

113

审稿时长

61 days

期刊介绍： Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.