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Theoretical models of low-energy (d,p) single-neutron transfer reactions are a crucial link between experimentation, nuclear structure and nuclear astrophysical studies. Whereas reaction models that use local optical potentials are…

Nuclear Theory · Physics 2016-11-23 G. W. Bailey , N. K. Timofeyuk , J. A. Tostevin

We have developed an approximate way of dealing with explicit energy-dependence of non-local nucleon optical potentials as used to predict the $(d,p)$ cross sections within the adiabatic theory. Within this approximation, the non-local…

Nuclear Theory · Physics 2015-06-18 R. C. Johnson , N. K. Timofeyuk

Theoretical models of the (d,p) reaction are exploited for both nuclear astrophysics and spectroscopic studies in nuclear physics. Usually, these reaction models use local optical model potentials to describe the nucleon- and…

Nuclear Theory · Physics 2017-03-08 G. W. Bailey , N. K. Timofeyuk , J. A. Tostevin

Background: Traditionally, nucleon-nucleus optical potentials are made local for convenience. In recent work we studied the effects of including nonlocal interactions explicitly in the final state for (d,p) reactions, within the distorted…

Nuclear Theory · Physics 2016-01-20 L. J. Titus , F. M. Nunes , G. Potel

Background: Deuteron-induced one-neutron transfer reactions have been used to extract single-particle properties of nuclei, and the adiabatic (AD) approximation is often used to simply treat the deuteron breakup states. Purpose: The primary…

Nuclear Theory · Physics 2017-06-16 Y. Chazono , K. Yoshida , K. Ogata

Adiabatic distorted-wave approximation (ADWA) study of three-body $(d,p)$ transfer reactions [G.W. Bailey, N.K. Timofeyuk, and J.A. Tostevin, Phys. Rev. Lett. 117, 162502 (2016)] reported strong sensitivity of cross sections to the…

Nuclear Theory · Physics 2018-09-26 A. Deltuva

Single-neutron transfer reactions populating states in the continuum are interesting both for structure and astrophysics. In their description often global optical potentials are used for the nucleon-target interactions, and these…

Nuclear Theory · Physics 2018-11-14 Weichuan Li , Gregory Potel , Filomena Nunes

The nonlocal dispersive optical model (NLDOM) nucleon potentials are used for the first time in the adiabatic analysis of a (d,p) reaction to generate distorted waves both in the entrance and exit channels. These potentials were designed…

Nuclear Theory · Physics 2016-10-04 S. J. Waldecker , N. K. Timofeyuk

Background: In the last year we have been exploring the effect of the explicit inclusion of nonlocality in (d,p) reactions. Purpose: The goal of this work is to extend previous studies to (d,n) reactions, which, although similar to (d,p),…

Nuclear Theory · Physics 2016-08-03 A. Ross , L. J. Titus , F. M. Nunes

Using adiabatic distorted-wave approximation (ADWA) with nonlocal optical potentials (NLOP) for $(d,p)$ transfer reactions [G.W. Bailey, N.K. Timofeyuk, and J.A. Tostevin, Phys. Rev. Lett. 117, 162502 (2016)] reported strong sensitivity to…

Nuclear Theory · Physics 2018-06-07 A. Deltuva

Model uncertainties, arising due to suppression of target excitations in the description of deuteron scattering and resulting in a modification of the two-body interactions in a three-body system, are investigated for several $(d,p)$…

Nuclear Theory · Physics 2021-09-22 M. J. Dinmore , N. K. Timofeyuk , J. S. Al-Khalili

The contribution of a three-nucleon (3N) force, acting between the neutron and proton in the incoming deuteron with a target nucleon, to the deuteron-target potential in the entrance channel of the $A(d,p)B$ reaction has been calculated…

Nuclear Theory · Physics 2020-12-04 N. K. Timofeyuk , M. J. Dinmore , J. S AL-Khalili

The change in mass of a nucleon, arising from its interactions with other nucleons inside the target, results in velocity-dependent terms in the Schr\"odinger equation that describes nucleon scattering. It has recently been suggested in a…

Nuclear Theory · Physics 2019-05-22 N. K. Timofeyuk

With the increasing interest in using (d,p) transfer reactions to extract structure and astrophysical information, it is important to evaluate the accuracy of common approximations in reaction theory. Starting from the zero-range adiabatic…

Nuclear Theory · Physics 2014-11-21 N. B. Nguyen , F. M. Nunes , R. C. Johnson

We solved the nonlocal scattering and bound state equations using the Perey-Buck type interaction, and compared to local equivalent calculations. Using the distorted wave Born approximation we construct the T-matrix for (p,d) transfer on…

Nuclear Theory · Physics 2016-04-04 Luke J. Titus

We point out that after presenting our results on high $n$-$p$ momentum sensitivity of the $(d,p)$ cross sections in [Phys. Rev. Lett. 117 162502 (2016)] the last paragraph of our Letter refers to a need of going beyond the leading order of…

Nuclear Theory · Physics 2018-06-14 G. W. Bailey , N. K. Timofeyuk , J. A. Tostevin

We present a suite of codes (NLAT for nonlocal adiabatic transfer) to calculate the transfer cross section for single-nucleon transfer reactions, $(d,N)$ or $(N,d)$, including nonlocal nucleon-target interactions, within the adiabatic…

Nuclear Theory · Physics 2016-09-21 L. J. Titus , A. Ross , F. M. Nunes

The Perey-effect in two-body channels of $(d,p)$ reactions has been known for a long time. It arises when the nonlocal two-body deuteron-target and/or proton-target problem is approximated by a local one, manifesting itself in a reduction…

Nuclear Theory · Physics 2019-07-24 M. Gómez-Ramos , N. K. Timofeyuk

A widely accepted practice for treating deuteron breakup in $A(d,p)B$ reactions relies on solving a three-body $A+n+p$ Schr\"odinger equation with pairwise $A$-$n$, $A$-$p$ and $n$-$p$ interactions. However, it was shown in [Phys. Rev. C…

Nuclear Theory · Physics 2019-06-26 M. J. Dinmore , N. K. Timofeyuk , J. S. Al-Khalili , R. C. Johnson

The activation cross sections of (d,p), (d,2n), (d,3n), and (d,2p) reactions on 63,65Cu were measured in the energy range from 4 to 20 MeV using the stacked-foils technique. Then, following the available elastic-scattering data analysis…

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