Indication of γ-vibration in 123, 125, 127I. (13th August 2020)

• Record Type: Journal Article
• Authors: Chakraborty, S; Sharma, H P; Tiwary, S S; Majumder, C; Banerjee, P; Ganguly, S; Kumar, S; Kumar, A; Kumar, A; Singh, R P; Muralithar, S
• Is Part Of: Journal of physics. Volume 47:Number 9(2020:Sep.)
• Publication Date: 2020-08-13
• Subjects: 123–127I -- γ-vibration -- chiral rotation -- A ≈ 130 -- INGA; Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/1361-6471/ab97c8
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: High spin states in 127 I were populated via 124 Sn( 7 Li, 4n γ ) fusion-evaporation reaction at E beam = 33 MeV. Level scheme of 127 I has been updated by placing new γ -rays and also by confirming the spin/parity of several energy levels. Two new levels at E x = 2628 and 3199 keV have been identified which are found to decay into the negative parity πh 11/2 band. These two states and two earlier reported states at 3502 and 3989 keV have been interpreted as the γ -vibrational states on the basis of their decay pattern. Two positive parity three-quasiparticle bands above I π = 23/2 + states at 2901 and 3060 keV have been identified to be a possible candidate of chiral band. A comparison in the isotopic and isotonic chains reveals the possible existence of γ -vibration and chiral rotation in 123–127 I.