6533b81ffe1ef96bd1278f93
RESEARCH PRODUCT
Shape coexistence in odd-mass Au isotopes: Determination of the excitation energy of the lowest intruder state in ^{179}Au
C. ScholeyP. RahkilaJ. L. WoodM. VenhartM. VenhartRobert PageAndrei AndreyevAndrei AndreyevM. NymanUlrika JakobssonR. JulinPauli PeuraJuha SorriL. BiancoPeter M. JonesJan SarénJuha UusitaloS. JuutinenS. AntalicPaul GreenleesSteffen KetelhutMatti LeinoJ. Thomsonsubject
Mass numberPhysicsNuclear and High Energy PhysicsIsotopeta114010308 nuclear & particles physicsIsomer in 179Au7. Clean energy01 natural sciencesIntruder stateπh9/2+1 and πf7/2+1 intruder structures around N=1040103 physical sciencesNeutronAlpha decayIsotopes of goldAtomic physics010306 general physicsSpectroscopyExcitationdescription
Abstract Phenomenon of the shape coexistence has been investigated in 17979Au100. This very neutron-deficient isotope, 18 neutrons away from the stable gold isotope 19779Au118, was studied by a combination of α-decay and isomer-decay spectroscopy employing the ritu gas-filled separator and the great focal-plane spectrometer at the University of Jyvaskyla. A new isomer with t 1 / 2 = 328 ( 2 ) ns was observed and states associated with π d 3 / 2 − 1 , π s 1 / 2 − 1 , π f 7 / 2 + 1 and π h 9 / 2 + 1 structures were revealed. The implications of these results on the systematics of π h 9 / 2 + 1 and π f 7 / 2 + 1 intruder structures in the odd-mass gold isotopes are discussed. The minimum of the parabolic trend is at N = 104 , i.e. exactly at the mid-shell point and the π f 7 / 2 + 1 structure is dropping in energy relative to the π h 9 / 2 + 1 with decreasing mass number.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-01-01 | Physics Letters B |