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Direct reactions using few-body models

使用少体模型的直接反应

基本信息

批准号：
EP/E036627/1
负责人：
Jeffrey Tostevin
金额：
$ 1.77万
依托单位：
University of Surrey
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2007
资助国家：
英国
起止时间：
2007 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FE036627%2F1
关键词：
Direct reactions using few body

项目摘要

Today nuclear physicists are able to produce short-lived exotic nuclei with very abnormal neutron and proton combinations by using dedicated, laboratory-based accelerators. It is a scientific challenge both to calculate and measure their novel properties, structures and stability. Testing and improving our knowledge and the accuracy of the theoretical predictions for these completely new nuclei is a long term goal to which this research project will contribute. Many exotic nuclei are rather weakly bound and can thus be accurately modelled as two-, three- or four- interacting particles. These particles can be individual nucleons or bound clusters of nucleons. Such dynamical models are referred to as few-body models. The proposed research brings together nuclear reactions and few-body nuclear structure model experts to continue ongoing research, including that of research students, in three areas. These are (a) to examine the description of resonances in three-body structures, and the way they then decay, by comparing the theoretical three-body hyperspherical scattering and R(reaction)-matrix methods, (b) to extend the mathematical and computational methods for calculations of bound three-body systems to allow calculations four-body systems, and (c) to develop the theory of the (p,2p) nucleon-knockout reaction to understand future expeiments. These reactions, in which a proton is removed from a nucleus, allows the quantum mechanical state of the removed nucleon to be probed, and hence brings information of the structure of the original nucleus.

今天，核物理学家能够通过使用专用的实验室加速器，制造出具有非常异常的中子和质子组合的短寿命奇异核。计算和测量它们的新性质、结构和稳定性是一项科学挑战。测试和提高我们对这些全新原子核的知识和理论预测的准确性是这个研究项目将有助于实现的一个长期目标。许多外来核的束缚相当弱，因此可以精确地模拟为两种、三种或四种相互作用的粒子。这些粒子可以是单独的核子，也可以是结合在一起的核子团。这种动力学模型称为少体模型。拟议的研究将核反应和少体核结构模型专家聚集在一起，继续在三个领域进行正在进行的研究，包括研究生的研究。这些是(a)通过比较理论三体超球面散射和R（反应）矩阵方法来检查三体结构中共振的描述，以及它们随后衰变的方式，(b)扩展计算束缚三体系统的数学和计算方法，以允许计算四体系统，以及(c)发展（p,2p）核敲除反应的理论，以了解未来的实验。在这些反应中，一个质子从原子核中被移除，从而可以探测被移除的核子的量子力学状态，从而获得原始原子核结构的信息。