Quadrupole moments of the and 7+ isomers in 117, 118Sb and the deformation induced by the proton-hole intruder state

Ionescu‐Bujor, M.; Iordăchescu, A.; Pascovici, G.; Sabaiduc, V.

doi:10.1016/0370-2693(88)90767-8

Cited by 10 publications

(6 citation statements)

References 25 publications

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“…This band had been previously observed from the I π = 7 − band head to the I π = 11 − state, but has been extended up to I π = (14) − in this work. On the basis of magnetic moment measurements [16], band 2 was proposed to be built predominantly on the πg −1 9/2 ⊗ νd 5/2 configuration. Prior to this work, only two transitions belonging to band 3 were reported by Fayez-Hassan et al [15], but no interpretation was made at that time.…”

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confidence: 99%

Shape coexistence and strongly coupled bands inSb118

Wang

Sun

et al. 2010

Phys. Rev. C

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Excited states of 118 Sb were populated via the 116 Cd( 7 Li,5n) 118 Sb fusion-evaporation reaction at a beam energy of 50 MeV. The previously known level scheme has been considerably extended, and about 36 new transitions were added into the level scheme of 118 Sb. One new rotational band has been identified, and assigned the πg −1 9/2 ⊗ νg 7/2 configuration. The configuration-fixed constrained triaxial relativistic mean-field approaches and the particle-rotor model calculations are employed for analysis of the level structure of 118 Sb.

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confidence: 99%

Shape coexistence and strongly coupled bands inSb118

Wang

Sun

et al. 2010

Phys. Rev. C

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“…This state has also been observed in [ 1] where its half-life was measured as 10.3 ns, and in a very recent l t3In(~, n) study [7]. The occurrence of the positive parity rotational-like band suggests the presence of a deformation which could be also associated to the g9/2 proton-hole excitation known to be responsible for shape coexistence in Sb nuclei [4,5,[8][9][10]. To check this assumption we have performed measurements to determine the static electromagnetic moments of the 7 § isomeric bandhead in ~6Sb and the obtained results are reported in the present paper.…”

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confidence: 66%

“…The 1 g9/2 proton-hole excitation is systematically associated with large quadrupole moments, what evidences its influence on core polarization. Deformation values of tim0.2, similar to that obtained in the present study, were also determined for the isomer intruder states in 117-119Sb [9,10]. The electromagnetic moments are therefore, besides the collective bands, fingerprints of shape coexistence in Sb nuclei.…”

Section: Discussionmentioning

confidence: 91%

“…In the fitting procedure the free parameters were the Larmor frequency coc, the quadrupole frequency o)Q and the phase ~0. The A 2 coefficient was kept fixed at the value determined from the data on liquid target, taking into account the information provided by previous TDPAD studies of the SbIn system [9], which showed no dealignment due to radiation induced defects in the target at room temperature.…”

Section: Experimental Procedures and Resultsmentioning

confidence: 99%

“…Besides the state investigated in the present work, several other 7 + states with measured electromagnetic moments are presently known in odd-odd nuclei near Z= 50: l~176 [16] 47Ag [17], t06 l12T ~18qh51 oU [9,21]. All these moments are displayed in Fig.…”

Section: Discussionmentioning

confidence: 99%

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Electromagnetic moments of the 7+ rotational bandhead in116Sb

Ionescu‐Bujor¹,

Iordăchescu²,

Pascovici³

1992

Z. Physik A - Hadrons and Nuclei

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The magnetic and electric quadrupole moments of the 7 § isomeric state in 1~6Sb with T1/2 =11.9(6) ns have been measured by TDPAD method. The state was populated in the 113In(~, n) reaction at E~ = 22 MeV. The obtained results are: /t= +4.69 (10) been located at 776 keV above the 8 long-lived isomer and a half-life of 12.6 ns has been determined for it. This state has also been observed in [ 1] where its half-life was measured as 10.3 ns, and in a very recent l t3In(~, n) study [7]. The occurrence of the positive parity rotational-like band suggests the presence of a deformation which could be also associated to the g9/2 proton-hole excitation known to be responsible for shape coexistence in Sb nuclei [4,5,[8][9][10]. To check this assumption we have performed measurements to determine the static electromagnetic moments of the 7 § isomeric bandhead in ~6Sb and the obtained results are reported in the present paper.

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