Work

Study of the Pygmy Dipole Resonance via ($d,p$) reactions

Year: 2024

Type: article

Abstract: The low-lying E1 strength below, around, and partially above the neutron-separation threshold, Sn, is often referred to as Pygmy Dipole Resonance (PDR). At the moment, it is not clear whether the PDR is a collective excitation mode and whether it is a general feature of the γ-ray strength function, which needs to be answered to reliably calculate capture rates for nucleosynthesis processes when using statistical Hauser-Feshbach approaches. To further understand the microscopic origin of the PDR and possible cancellation effects between isovector E1 matrix elements, which appear to be strongly model-dependant, an experimental program studying the neutron one-particle-one-hole (1p-1h) structure of the PDR via (d, p) and (d, pγ) reactions was started. Some results of the already published work will be discussed and additional remarks, including future plans, are made.

Source: OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)

DOI: 10.1393/ncc/i2024-24020-5

Author: Spieker, M. [Florida State University, Tallahassee, FL (United States)]

Institution: Florida State University

Language: English

Topic: Nuclear physics research studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, U.S. Department of Energy, Florida State University

Awards: WoU-MMA: Studies of Nuclear Structure and Nuclear Astrophysics, TEXAS A&M UNIVERSITY CENTER OF EXCELLENCE IN NUCLEAR TRAINING AND UNIVERSITY BASED RESEARCH (CENTAUR)