Validity of the distorted-wave impulse-approximation description of Ca40(e,e′p)K39 data using only ingredients from a nonlocal dispersive optical model-猫眼课题宝

仅使用非局域色散光学模型成分对 Ca40(e,e′p)K39 数据进行畸变波脉冲近似描述的有效性

DOI：

发表时间：

2018

期刊：

Physical Review C

影响因子：

3.1

通讯作者：

中科院分区：

物理与天体物理2区

文献类型：

作者：

M. Atkinson;H. Blok;L. Lapik'as;R. Charity;W. H. Dickhoff

色散光学模型（DOM）的非局域实现提供了（e，e′p）反应的扭曲波脉冲近似（DWIA）计算的所有成分。它提供了重叠函数，包括其归一化，和输出质子扭曲波。这个框架被应用于描述敲除质子从0 d32和1 s12轨道在Ca 40与固定的归一化为0.71和0.60，分别。三个传出的质子能量：70，100，和135兆电子伏的平行运动学中获得的数据。与数据的协议是一样好，或更好，以前的描述采用本地光学潜力和重叠功能的伍兹-撒克逊潜力-无论是与标准的非定域性校正-其归一化（光谱因子）和半径拟合的数据。目前的分析表明，稍大的光谱因子时，得到的非本地光学电位比本地电位产生的。结果进一步表明，所选择的动力学窗口约100 MeV的质子能量提供了最好的和最干净的方法，采用DWIA分析该反应。因此，详细证实了在描述闭壳层原子核时，大量的基态关联不能被忽略的结论。为了得出这些结论，有必要有一个完整的描述的核子单粒子传播子，占所有弹性核子散射可观的能量域高达200兆电子伏。DOM的当前非局部实现满足了这一要求。

The nonlocal implementation of the dispersive optical model (DOM) provides all the ingredients for distorted-wave impulse-approximation (DWIA) calculations of the (e,e′p) reaction. It provides both the overlap function, including its normalization, and the outgoing proton distorted wave. This framework is applied to describe the knockout of a proton from the 0d32 and 1s12 orbitals in Ca40 with fixed normalizations of 0.71 and 0.60, respectively. Data were obtained in parallel kinematics for three outgoing proton energies: 70, 100, and 135 MeV. Agreement with the data is as good as, or better than, previous descriptions employing local optical potentials and overlap functions from Woods-Saxon potentials - both with standard nonlocality corrections - whose normalization (spectroscopic factor) and radius were fitted to the data. The present analysis suggests that slightly larger spectroscopic factors are obtained when nonlocal optical potentials are employed than those generated with local potentials. The results further suggest that the chosen kinematical window around 100 MeV proton energy provides the best and cleanest method to employ the DWIA for the analysis of this reaction. The conclusion that substantial ground-state correlations cannot be ignored when describing a closed-shell atomic nucleus is therefore confirmed in detail. To reach these conclusions, it is essential to have a complete description of the nucleon single-particle propagator that accounts for all elastic nucleon-scattering observables in a wide energy domain up to 200 MeV. The current nonlocal implementation of the DOM fulfills this requirement.

Quasifree (p, 2p) Reactions on Oxygen Isotopes: Observation of Isospin Independence of the Reduced Single-Particle Strength.

DOI： 10.1103/physrevlett.120.052501

发表时间： 2018-01

期刊：

Physical review letters

影响因子： 8.6

作者：

L. Atar;S. Paschalis;C. Barbieri;C. Bertulani;P. D. Fernandez;M. Holl;M. Najafi;V. Panin;H. Alvarez-Pol;T. Aumann;V. Avdeichikov;S. Beceiro-Novo;D. Bemmerer;J. Benlliure;J. M. Boillos;K. Boretzky;M. Borge;M. Caamano;C. Caesar;E. Casarejos;W. Catford;J. Cederkäll;M. Chartier;L. Chulkov;D. Cortina-Gil;E. Cravo;R. Crespo;I. Dillmann;Z. Elekes;J. Enders;O. Ershova;A. Estrade;F. Farinon;L. Fraile;M. Freer;D. G. Redondo;H. Geissel;R. Gernhäuser;P. Golubev;K. Göbel;J. Hagdahl;T. Heftrich;M. Heil;M. Heine;A. Heinz;A. Henriques;A. Hufnagel;A. Ignatov;H. Johansson;B. Jonson;J. Kahlbow;N. Kalantar-Nayestanaki;R. Kanungo;A. Kelić-Heil;A. Knyazev;T. Kröll;N. Kurz;M. Labiche;C. Langer;T. Bleis;R. Lemmon;S. Lindberg;J. Machado;J. Marganiec-Gałązka;A. Movsesyan;E. Nácher;E. Nikolskii;T. Nilsson;C. Nociforo;A. Perea;M. Petri;S. Pietri;R. Plag;R. Reifarth;G. Ribeiro;C. Rigollet;D. Rossi;M. Röder;D. Savran;H. Scheit;H. Simon;O. Sorlin;I. Syndikus;J. Taylor;O. Tengblad;R. Thies;Y. Togano;M. Vandebrouck;P. Velho;V. Volkov;A. Wagner;F. Wamers;H. Weick;C. Wheldon;G. Wilson;J. Winfield;P. Woods;D. Yakorev;M. Zhukov;A. Zilges;K. Zuber

通讯作者：

Validity of the distorted-wave impulse-approximation description of Ca40(e,e′p)K39 data using only ingredients from a nonlocal dispersive optical model

仅使用非局域色散光学模型成分对 Ca40(e,e′p)K39 数据进行畸变波脉冲近似描述的有效性

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