Universität zu Köln

Stahl, C., Leske, J., Bauer, C., Bazzacco, D., Farnea, E., Gottardo, A., John, P. R., Michelagnoli, C., Pietralla, N., Reese, M., Sahin, E., Birkenbach, B., Bracco, A., Crespi, F. C. L., de Angelis, G., Desesquelles, P., Eberth, J., Gadea, A., Goergen, A., Grebosz, J., Hess, H., Jolie, J., Jungclaus, A., Korten, W., Lenzi, S. M., Lunardi, S., Menegazzo, R., Mengoni, D., Modamio, V., Napoli, D. R., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Salsac, M. D., Soderstrom, P. -A., Stezowski, O., Theisen, Ch., Ur, C. A. and Valiente-Dobon, J. J. (2015). Population of the 2(ms)(+) mixed-symmetry state of Ba-140 with the alpha-transfer reaction. Phys. Rev. C, 92 (4). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1089-490X

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Abstract

Background: Identification of proton-neutron mixed-symmetric one-quadrupole phonon excitations (the 2(ms)(+) states) of atomic nuclei provides information on the isovector part of the residual nucleon-nucleon interaction. It was predicted that the 2(ms)(+) state of particular nuclei close to the U(5) limit of the interacting boson model, in particular Ba-140, should be considerably populated by alpha-transfer reactions [C. E. Alonso et al., Phys. Rev. C 78, 017301 (2008)]. Purpose: We aim at the identification of the 2(ms)(+) mixed-symmetry state (MSS) of radioactive Ba-140 and investigate its population by the alpha-transfer reaction as a suitable tool to selectively populate MSSs and as a potential new signature for its mixed-symmetric character. Method: A gamma-ray spectroscopy experiment was performed in inverse kinematics in order to populate the 2(ms)(+) state of Ba-140 by alpha-transfer from a C-nat target on Xe-136 beam ions. The population of the candidate for the 2(ms)(+) state of Ba-140 was measured relative to the population of the 2(1)(+) state. Results: The candidate for the 2(ms)(+) state of Ba-140 was populated by a transfer three times weaker than predicted. Another 2(+) state that can be ruled out as the MSS was in turn as strongly populated by the a transfer as predicted for the MSS. Conclusions: The relative population of 2(+) states by alpha-transfer cannot serve as a new signature for MSSs, since other 2(+) states are also strongly populated. Nevertheless, the substantial population of the MSS candidate of Ba-140 by alpha transfer qualifies this type of reaction as suitable tool to excite MSSs and study their electromagnetic decay properties.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Stahl, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Leske, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bauer, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bazzacco, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Farnea, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gottardo, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED John, P. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Michelagnoli, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pietralla, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Reese, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sahin, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Birkenbach, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bracco, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Crespi, F. C. L. UNSPECIFIED UNSPECIFIED UNSPECIFIED de Angelis, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Desesquelles, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Eberth, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gadea, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Goergen, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grebosz, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hess, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jolie, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jungclaus, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Korten, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lenzi, S. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lunardi, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Menegazzo, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mengoni, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Modamio, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Napoli, D. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pullia, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Quintana, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Recchia, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Reiter, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rosso, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Salsac, M. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Soderstrom, P. -A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stezowski, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Theisen, Ch. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ur, C. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Valiente-Dobon, J. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-389404
DOI:	10.1103/PhysRevC.92.044324
Journal or Publication Title:	Phys. Rev. C
Volume:	92
Number:	4
Date:	2015
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	1089-490X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language INELASTIC NEUTRON-SCATTERING; INTERACTING-BOSON MODEL; STRUCTURAL CHARACTERISTICS; PROTON; NUCLEI; ND-144; CE-142 Multiple languages Physics, Nuclear Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/38940