Time-resolved and time-integral on-line nuclear orientation measurements of neutron-deficient Hg−Au−Pt−Ir nuclei

Romanski, I.; Berkes, István; Brown, D. E.; Jésus, M. de; Eder, R.; Grant, I. S.; Hagn, E.; Harding, P.; Herzog, P.; Hinfurtner, B.; Kastelein, B.; Postma, H.; Prinz, Janosch; Richards, P.; Stone, N. J.; Vanneste, L.; Zech, E.; Isolde, Nicole

doi:10.1007/bf02399003

Cited by 11 publications

(8 citation statements)

References 25 publications

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“…As discussed below, a positive magnetic dipole moment, μ( 182 Au) derived in Ref. [48] is confirmed by the present data, while the first measurement of μ( 180 Au) and its negative sign were deduced in this work. Figure 6 shows the respective differences in the hfs between the two cases.…”

Section: Spin Assignments For 180182 Ausupporting

confidence: 89%

“…By comparing the g factors from the two methods, the authors of Ref. [48] derived μ( 182 Au) = 1.65 (15) μ N by assuming I = 3, which gave the best agreement between the two different experimental techniques, although a spin value of I = 2 could not be excluded, as was stated by the authors themselves. A subsequent β + /EC decay study of 182 Hg → 182 Au at ISOLDE [49] proposed a g.s.…”

Section: Proton and Neutron Nilsson Orbitals Relevant For 180182 Aumentioning

confidence: 99%

“…from hfs structure for 182 Au with known data (configuration and magnetic dipole moment) for the I = (2 + ) ground state of 182 Au, deduced in Refs. [48,49], is instructive for validating the analysis procedures applied for 180 Au.…”

Section: Hyperfine Structure Measurements For 180182 Aumentioning

confidence: 99%

“…The previously reported value of μ( 182 Au) originates from g-factor measurements employing time-resolved and timeintegral on-line nuclear orientation methods at the NICOLE-ISOLDE facility, and considering a range of spin assumptions I = 1-5, see Table 3 of Ref. [48]. By comparing the g factors from the two methods, the authors of Ref.…”

Section: Proton and Neutron Nilsson Orbitals Relevant For 180182 Aumentioning

confidence: 99%

See 3 more Smart Citations

Laser-assisted decay spectroscopy for the ground states of Au180,182

Harding¹,

Andreyev²,

Barzakh³

et al. 2020

Phys. Rev. C

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Section: Spin Assignments For 180182 Ausupporting

confidence: 89%

Section: Proton and Neutron Nilsson Orbitals Relevant For 180182 Aumentioning

confidence: 99%

Section: Hyperfine Structure Measurements For 180182 Aumentioning

confidence: 99%

Section: Proton and Neutron Nilsson Orbitals Relevant For 180182 Aumentioning

confidence: 99%

See 2 more Smart Citations

Laser-assisted decay spectroscopy for the ground states of Au180,182

Harding¹,

Andreyev²,

Barzakh³

et al. 2020

Phys. Rev. C

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“…The isomeric shift, which is the displacement of the centers of gravity of the two hyperfine spectra, determines the mean square charge radius variation d͗r 2 c ͘ 184g,184m . These measurements are particularly challenging since gold beams are no longer available from 0031-9007͞97͞79(12)͞2213(4)$10.00isotope separators and the half-lives of both states are relatively short (T 1͞2,m ϳ 45 s and T 1͞2,g ϳ 20 s [12,24] or T 1͞2,m 28 s and T 1͞2,g 12 s [25]). We developed the COMPLIS experimental setup [26] which consists of laser desorbing implanted atoms followed by a RIS (resonance ionization spectroscopy) study.…”

mentioning

confidence: 99%

Nuclear Moments and Deformation Change inA184ug,m
Blanc
¹
,
Obert
²
,
Oms
³

et al. 1997
Phys. Rev. Lett.
46
0
19
0
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Resonance ionization spectroscopy (RIS) was performed on desorbed Au, and the complete hyperfine spectrum of both isomeric and ground states of the short lived 184 Au nucleus has been recorded from the 5d 10 6s 2 S 1͞2 ! 5d 10 6p 2 P 3͞2 optical transition. The nuclear moments of both states and the mean square charge radius changes were measured. The magnetic moments were determined to be m 184g Light gold isotopes belong to a mass region where drastic changes in the nuclear charge radius have been measured by laser spectroscopy. Such alterations have shown alternating shape transitions and deformation changes between neighboring isotopes. This was observed in mercury [1,2], gold [3][4][5], and to a lesser degree in platinum isotopes [6,7]. Different deformations have also been observed in the states of the same nucleus. The best example is 185 Hg where the large radius difference measured between its ground and isomeric state [8] has shown a prolate-oblate shape coexistence which was confirmed later from g-ray spectroscopic studies [9,10].In this context, the doubly odd nucleus 184 Au with its isomeric state at 68 keV excitation energy [11,12] is particularly interesting to investigate since it is located in the middle of this transitional region [13,14]: States corresponding to prolate and oblate or triaxial shapes coexist in 183,185 Au [9,15,16] and 185 Hg, while 183 Pt is prolate in all its low energy states [17][18][19]. Several nuclear spectroscopy studies were performed on 184 Au, and it has been established that (i) a shape coexistence is excluded at low excitation energy [20], and (ii) the spin and parity are 5 1 for the ground state and 2 1 for the isomer with the following proton-neutron ͑p ≠ n͒ configurations: ph 9 2 ≠ n 7 2 ͓514͔ and ph 9 2 ≠ n 1 2 ͓521͔, respectively [21]. Furthermore, calculations using rotor 1 one-quasiparticle and rotor 1 two-quasiparticle coupling models were performed on the N 105 isotones 183 Pt, 182 Ir [22], 185 Hg, and 184 Au [23]. They show that the relative energy location of the 5 1 and 2 1 states suggests a deformation change, either between 184 Au g and 184 Au m or between 184 Au and its neighboring isotopes. Therefore, the determination of the quadrupole moment in both isomer and ground states, as well as the change in the mean square charge radius between them, is crucial to fully characterize their nuclear shape. Moreover, a measurement of the magnetic moments of the two states will allow a clear confirmation of the p ≠ n configurations. In addition, the p ≠ n coupling scheme can be defined from the quadrupole moment values.In this Letter, we present optical measurements on 184 Au. The hyperfine structure is measured providing the magnetic A and electrostatic B hyperfine constants of the levels involved in the atomic transition as well as the isomeric shift. A is related to the magnetic moment m I , and B to the spectroscopic quadrupole moment Q s . The isomeric shift, which is the displacement of the centers of gravity of the two hyperfine spectra, determines the...

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Nuclear spin andg-factor from time resolved andtime integral on-line nuclear orientation experiments

Richards

Stone

1993

Hyperfine Interact

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Time-resolved and time-integral on-line nuclear orientation measurements of neutron-deficient Hg−Au−Pt−Ir nuclei

Cited by 11 publications

References 25 publications

Laser-assisted decay spectroscopy for the ground states of Au180,182

Laser-assisted decay spectroscopy for the ground states of Au180,182

Nuclear Moments and Deformation Change inA184ug,m
Blanc
¹
,
Obert
²
,
Oms
³

et al. 1997
Phys. Rev. Lett.
46
0
19
0
View full text Add to dashboard Cite

Nuclear spin andg-factor from time resolved andtime integral on-line nuclear orientation experiments

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Time-resolved and time-integral on-line nuclear orientation measurements of neutron-deficient Hg−Au−Pt−Ir nuclei

Cited by 11 publications

References 25 publications

Laser-assisted decay spectroscopy for the ground states of Au180,182

Laser-assisted decay spectroscopy for the ground states of Au180,182

Nuclear Moments and Deformation Change inA184ug,mBlanc1, Obert2, Oms3 et al. 1997Phys. Rev. Lett.460190View full textAdd to dashboardCite

Nuclear spin andg-factor from time resolved andtime integral on-line nuclear orientation experiments

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Nuclear Moments and Deformation Change inA184ug,m
Blanc
¹
,
Obert
²
,
Oms
³

et al. 1997
Phys. Rev. Lett.
46
0
19
0
View full text Add to dashboard Cite