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Rotbard, G.; Larana, G.; Vergnes, M.; Berrier, G.; Kalifa, J.; Guilbault, F.; Tamisier, R.

doi:10.1103/physrevc.18.86

Cited by 51 publications

(14 citation statements)

References 21 publications

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“…A combination of the results from previous experiments opens the possibility of a 1/2 − , 3/2 − ground-state doublet in 73 Ga. The existence of such a doublet is compatible with the available transfer reaction data as the population of the yrast 1/2 − state is weak compared to the 3/2 − ground state in similar experiments studying 69,71 Ga [4,6,7]. From the energy systematics, there seems to be a more general structural difference between the odd-A gallium isotopes up to 69 Ga 38 and those with 40 neutrons or more (see Fig.…”

Section: Introductionsupporting

confidence: 86%

“…Considering recent laser spectroscopy data, the ground-state spin was found to be 1/2 − while transfer reactions gave evidence for a 3/2 − state close to the ground state. No evidence for a doublet near the ground state of 73 Ga was obtained from the transfer reaction studies [4][5][6][7][8][9].…”

Section: Resultsmentioning

confidence: 98%

“…The structure of the neutron-rich odd-A gallium isotopes (Z = 31) has been studied in the past by means of β decay [1][2][3], single-and multiparticle transfer reactions [4][5][6][7][8][9], and more recently by deep inelastic reactions [10]. The twoneutron-transfer reaction data suggest a change in structure between 71 Ga 40 and 73 Ga 42 , which is most probably related to the structural difference observed between 72 Ge 40 and 74 Ge 42 (Z = 32), where both the 72 Ge 40 (t,p) 74 Ge 42 and 74 Ge 42 (p,t) 72 Ge 40 reactions strongly populate the excited 0 + state, indicating a shape transition [11].…”

Section: Introductionmentioning

confidence: 99%

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Coulomb excitation ofGa73

Diriken¹,

Stefanescu²,

Balabanski³

et al. 2010

Phys. Rev. C

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The B(E2; I i → I f ) values for transitions in 71 31 Ga 40 and 73 31 Ga 42 were deduced from a Coulomb excitation experiment at the safe energy of 2.95 MeV/nucleon using post-accelerated beams of 71,73 Ga at the REX-ISOLDE on-line isotope mass separator facility. The emitted γ rays were detected by the MINIBALL γ -detector array, and B(E2; I i → I f ) values were obtained from the yields normalized to the known strength of the 2 + → 0 + transition in the 120 Sn target. The comparison of these new results with the data of less neutron-rich gallium isotopes shows a shift of the E2 collectivity toward lower excitation energy when adding neutrons beyond N = 40. This supports conclusions from previous studies of the gallium isotopes, which indicated a structural change in this isotopic chain between N = 40 and 42. Combined with recent measurements from collinear laser spectroscopy showing a 1/2 − spin and parity for the ground state, the extracted results revealed evidence for a 1/2 − , 3/2 − doublet near the ground state in 73 31 Ga 42 differing by at most 0.8 keV in energy.

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Section: Introductionsupporting

confidence: 86%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Coulomb excitation ofGa73

Diriken¹,

Stefanescu²,

Balabanski³

et al. 2010

Phys. Rev. C

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“…These reactions had been studied before [7], however the two previous experiments were done at different times and apparently with slightly different techniques, so that the relative cross sections may have additional uncertainties. In addition, the publications do not report cross sections, just figures showing selected angular distributions and tables of spectroscopic factors.…”

mentioning

confidence: 99%

Nuclear structure relevant to neutrinoless doubleβdecay: The valence protons inGe76and
Kay
¹
,
Schiffer
²
,
Freeman
³

et al. 2009
Phys. Rev. C

113

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The possibility of observing neutrinoless double β decay offers the opportunity of determining the effective neutrino mass if the nuclear matrix element were known. Theoretical calculations are uncertain and the occupations of valence orbits by nucleons active in the decay are likely to be important. The occupation of valence proton orbits in the ground states of 76 Ge, a candidate for such decay, and 76 Se, the corresponding daughter nucleus, were determined by precisely measuring cross sections for proton-removing transfer reactions. As in previous work on neutron occupations, we find that the Fermi surface for protons is much more diffuse than previously thought, and the occupancies of at least three orbits change significantly between the two 0 + ground states.

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“…Therefore, 73 Ga, with N = 42, is of great interest. The collectivity in this odd-Z nuclide has been known after two-neutron transfer (t,p) reaction studies on stable 69,71 Ge [10][11][12]. The 73 Ga spectroscopic information was deduced from the transferred angular momentum.…”

Section: Introductionmentioning

confidence: 99%

Search for the Ga73 ground-state doublet splitting in the β decay of Zn73

Vedia¹,

Paziy²,

Fraile³

et al. 2017

Phys. Rev. C

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The existence of two close-lying nuclear states in 73 Ga has recently been experimentally determined: a 1/2 − spin-parity for the ground state was measured in a laser spectroscopy experiment, while a J π = 3/2 − level was observed in transfer reactions. This scenario is supported by Coulomb excitation studies, which set a limit for the energy splitting of 0.8 keV. In this work, we report on the study of the excited structure of 73 Ga populated in the β decay of 73 Zn produced at ISOLDE, CERN. Using β-gated, γ -ray singles, and γ -γ coincidences, we have searched for energy differences to try to delimit the ground-state energy splitting, providing a more stringent energy difference limit. Three new half-lives of excited states in 73 Ga have been measured using the fast-timing method with LaBr 3 (Ce) detectors. From our study, we help clarify the excited structure of 73 Ga and we extend the existing 73 Zn decay to 73 Ga with 8 new energy levels and 35 γ transitions. We observe a 195-keV transition consistent with a γ ray de-exciting a short-lived state in the β-decay parent 73 Zn.

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Ge70,72,74,76(d

Cited by 51 publications

References 21 publications

Coulomb excitation ofGa73

Coulomb excitation ofGa73

Nuclear structure relevant to neutrinoless doubleβdecay: The valence protons inGe76and
Kay
¹
,
Schiffer
²
,
Freeman
³

et al. 2009
Phys. Rev. C

Search for the Ga73 ground-state doublet splitting in the β decay of Zn73

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Ge70,72,74,76(d

Cited by 51 publications

References 21 publications

Coulomb excitation ofGa73

Coulomb excitation ofGa73

Nuclear structure relevant to neutrinoless doubleβdecay: The valence protons inGe76andKay1, Schiffer2, Freeman3 et al. 2009Phys. Rev. C

Search for the Ga73 ground-state doublet splitting in the β decay of Zn73

Contact Info

Product

Resources

About

Nuclear structure relevant to neutrinoless doubleβdecay: The valence protons inGe76and
Kay
¹
,
Schiffer
²
,
Freeman
³

et al. 2009
Phys. Rev. C