| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:10 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Study of monopole strength in 156Gd nucleus
Authors:
Alina IONESCU (1,2), Sorin PASCU (2), Octavian SIMA (1)
*
Affiliation:
1) University of Bucharest, Faculty of Physics, 405 Atomistilor St., 077125 Magurele, ILFOV, POB MG-11, Romania
2) Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH), 30 Reactorului St., 077125 Magurele, ILFOV, POB MG-6, Romania
E-mail
ionescu_alina98@yahoo.com
Keywords:
rare-earth region, 0+ states, (p,t) direct transfer reaction, angular distributions, Q3D magnetic spectrometer, Distorted Wave Born Approximation (DWBA), Interacting Boson Model (IBM)
Abstract:
The rare-earth region is an ideal part for the study of collective motion. We chose to study nuclei from this region because we want to understand the nature of 0+ states, which are important excitations in this region [1,2]. For this study we selected the 156Gd nucleus and the (p,t) direct transfer reaction which is well known for its ability to reveal 0+ excitations . Angular distributions were measured at an incident energy of 23 MeV using Q3D magnetic spectrometer [3]. Two different reactions were used for energy calibration, 154Gd(p,t)152Gd and 126Te(p,t)124Te, measured in the same magnetic conditions. The angular distributions obtained in this experiment were compared with the calculations made using Distorted Wave Born Approximation (DWBA) and were used to extract information about the transferred monopole strength. Although 0+ excited states are complex and difficult to be described by theoretical models, our results are close to the predictions given by the Interacting Boson Model (IBM) [4] and suggest an increased contribution of the octupole degrees of freedom.
References:
[1] D. A. Meyer et al., Phys. Rev. C 74, 044309 (2006).
[2] D. G. Fleming, C. Gunther, G. Hagemann, B. Herskind and P. O. Tjom, Phys. Rev. C 8, 806 (1973).
[3] M. Löffler, H. J. Scheerer and H.Vonach, Nucl. Instr. Meth. 3, 1-12 (1973).
[4] F. Iachello and A. Arima, The Interacting Boson Model (Cambridge University Press, Cambridge, 1987).
|
|
|
|