Excited states in the neutron-deficient nuclei Rn-197,Rn-199,Rn-201Show others and affiliations
2008 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 77, no 5, p. 054303-1-054303-7Article in journal (Refereed) Published
Abstract [en]
Excited states of the extremely neutron-deficient radon isotopes with N = 111, 113, 115 have been studied for the first time in a series of in-beam experiments performed at the Accelerator Laboratory of the University of Jyvaskyla. The reactions used were: Sn-118(Kr-82, 3n)Rn-197, Sn-120(Kr-82, 3n)Rn-199, Sm-150(Cr-52, 3n)Rn-199, and Sn-122(Kr-82, 3n)Rn-201. The gamma rays emitted from excited states in the different isotopes were identified using the recoil-alpha-decay tagging technique. The estimated cross section for the production of Rn-197(m) was 7(3) nb, which is the lowest cross section reported so far for an in-beam study. The energies of the (17/2(+)) levels built on the isomeric (13/2(+)) states in Rn-197,Rn-199,Rn-201 indicate a transition from an anharmonic vibrational structure toward a rotational structure at low spins for these nuclei. However, the transition is not as sharp as predicted by theory.
Place, publisher, year, edition, pages
2008. Vol. 77, no 5, p. 054303-1-054303-7
Keywords [en]
EVEN-EVEN NUCLEI; GAMMA-RAY SPECTROSCOPY; ALPHA-DECAY; MEAN-FIELD; ISOTOPES; RN-198
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-8208DOI: 10.1103/PhysRevC.77.054303ISI: 000256885600013Scopus ID: 2-s2.0-43449092879OAI: oai:DiVA.org:kth-8208DiVA, id: diva2:13467
Note
QC 20100620
2008-04-092008-04-092017-12-14Bibliographically approved
In thesis