Retardation of B(E2; 01+ → 21+) rates in 90–96Sr and strong subshell closure effects in the A ~ 100 region

Mach, H.; Wohn, F. K.; Molnár, Gábor; Sistemich, K.; Hill, J. C.; Moszyński, M.; Gill, R. L.; Krips, W.; Brenner, D. S.

doi:10.1016/0375-9474(91)90001-m

Cited by 153 publications

(51 citation statements)

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“…We have investigated experimentally the β − decay of 66 Co to 66 Ni with the aim of measuring the half-life of the excited states populated in 66 Ni by means of the the Advanced Time-Delayed βγγ(t) method described in [20][21][22]. This experiment was part of a wider campaign to study the evolution of collectivity below 68 Ni [23][24][25].…”

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confidence: 99%

Search for shape-coexisting 0+ states in Ni66 from lifetime measurements

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confidence: 99%

Search for shape-coexisting 0+ states in Ni66 from lifetime measurements

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“…The experimental setup and data collection were optimized for the application of the ATD βγ γ (t) method described in [15,16,19], thus only a few details are given below. A time-delayed βγ (t) coincidence system was set between the β detector and each of the γ detectors and thus three parameters were required per coincident βγ (t) event: the energies of the β particle and the γ ray, and the time-delay between the β and γ events.…”

Section: Technical Aspectsmentioning

confidence: 99%

“…This calibration was further verified using the most intense γ lines in 30 Si from the experiment. In the ATD method [15,16,19] the time responses of the fast-timing γ detectors (BaF 2 crystals with a FWHM time resolution around 100 ps at 1 MeV) are carefully calibrated (to a picosecond precision) for various types of interactions of γ rays in the crystal (Compton and full energy peak (FEP) events). It is also checked that the shape of time spectra for prompt radiation is close to symmetric quasi-Gaussians over the range of the γ -ray energies of interest.…”

Section: Technical Aspectsmentioning

confidence: 99%

High-sensitivity study of levels in Al30 following β decay of Mg30
Mach¹,
Fraile²,
Benito³
et al. 2016
Phys. Rev. C
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γ -ray and fast-timing spectroscopy were used to study levels in 30 Al populated following the β − decay of 30 Mg. Five new transitions and three new levels were located in 30 Al. A search was made to identify the third 1 + state expected at an excitation energy of ∼2.5 MeV. Two new levels were found, at 3163.9 and 3362.5 keV, that are firm candidates for this state. Using the advanced time-delayed (ATD) βγ γ (t) method we have measured the lifetime of the 243.8-keV state to be T 1/2 = 15(4) ps, which implies that the 243.8-keV transition is mainly of M1 character. Its fast B(M1; 2 + → 3 + ) value of 0.10(3) W.u. is in very good agreement with the USD shell-model prediction of 0.090 W.u. The 1801.5-keV level is the only level observed in this study that could be a candidate for the second excited 2 + state.

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“…The ATD method was invented by Henryk Mach in 1986 in the TRISTAN facility located at Brookhaven National Laboratory, and developed and published by Mach et al [6][7][8]. As other delayed coincidence methods, it is based in the time distribution between the population of an excited state and its de-excitation.…”

Section: The Advanced Time Delayed βγγ(T) Method-technical Detailsmentioning

confidence: 99%

Fast-timing spectroscopy at ISOLDE

Fraile

2017

J. Phys. G: Nucl. Part. Phys.

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View the article online for updates and enhancements. Related contentNuclear-structure studies of exotic nuclei with MINIBALL P A Butler, J Cederkall and P Reiter AbstractThe advanced time-delayed bgg(t) method has been used at ISOLDE since the relocation of the facility from the synchrocyclotron to the CERN proton synchrotron booster, a quarter of a century ago. The method was designed for precision measurements with low-intensity beams, achieving good efficiency and excellent time resolution with a compact setup. Over this time the technique has evolved to cope with the challenge of measuring lifetimes of complex level schemes of increasingly exotic nuclei populated in β decay. The ISOLDE facility provides unsurpassed opportunities to study many regions of the nuclide chart. The physics case encompasses topics of interest across the nuclide chart, including the evolution of shell structure around neutron shell and subshell closures such as N=20, N=40 and N=50, shape coexistence, and octupole correlations in heavy nuclei. The recently commissioned ISOLDE decay station provides enhanced capabilities that will be fully exploited with the increased beam intensities available at the upcoming HIE-ISOLDE facility.

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Retardation of B(E2; 01+ → 21+) rates in 90–96Sr and strong subshell closure effects in the A ~ 100 region

Cited by 153 publications

References 33 publications

Search for shape-coexisting 0+ states in Ni66 from lifetime measurements

Search for shape-coexisting 0+ states in Ni66 from lifetime measurements

High-sensitivity study of levels in Al30 following β decay of Mg30
Mach¹,
Fraile²,
Benito³
et al. 2016
Phys. Rev. C
Self Cite
5
1
7
0
View full text Add to dashboard Cite

Fast-timing spectroscopy at ISOLDE

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Retardation of B(E2; 01+ → 21+) rates in 90–96Sr and strong subshell closure effects in the A ~ 100 region

Cited by 153 publications

References 33 publications

Search for shape-coexisting 0+ states in Ni66 from lifetime measurements

Search for shape-coexisting 0+ states in Ni66 from lifetime measurements

High-sensitivity study of levels in Al30 following β decay of Mg30Mach1, Fraile2, Benito3 et al. 2016Phys. Rev. CSelf Cite5170View full textAdd to dashboardCite

Fast-timing spectroscopy at ISOLDE

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High-sensitivity study of levels in Al30 following β decay of Mg30
Mach¹,
Fraile²,
Benito³
et al. 2016
Phys. Rev. C
Self Cite
5
1
7
0
View full text Add to dashboard Cite