A charge plunger device to measure the lifetimes of excited nuclear states where transitions are dominated by internal conversion

Barber, L.; Heery, J.; Cullen, D. M.; Singh, B. S. Nara; Herzberg, R.‐D.; Müller-Gatermann, C.; Beeton, G.; Bowry, M.; Dewald, Α.; Grahn, T.; Greenlees, P. T.; Illana, A.; Julin, R.; Juutinen, S.; Keatings, J. M.; Luoma, Minna‐Liisa; O’Donnell, D.; Ojala, J.; Pakarinen, J.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sarén, J.; Sinclair, J.; Smith, J. F.; Sorri, J.; Spagnoletti, P.; Tann, H.; Uusitalo, J.; Vilhena, J.; Zimba, G.

doi:10.1016/j.nima.2020.164454

Cited by 2 publications

(7 citation statements)

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“…In ref. [11], the CSD of ions detected in coincidence with the γ -ray de-excitation from the 4 + 1 state occurring before the reset foil were influenced only by the de-excitation from the 2 + 1 state via the internal conversion process. An analysis within the differential decay curve method (DDCM) [16] framework was performed to obtain the lifetime of the 2 + 1 state in 180 Pt.…”

Section: Introductionmentioning

confidence: 93%

“…As shown in Ref. [11], it is possible to use γ -ray coincidences with the charge plunger method and analyse the data in a DDCM framework. Figure 2a shows a rotational band level scheme.…”

Section: Ddcm Coincidence Analysismentioning

confidence: 99%

“…The mapping of the experimental observables to the number of T 1 transitions occurring after and before the reset foil is developed in Ref. [11] and the result is given here.…”

Section: Ddcm Coincidence Analysismentioning

confidence: 99%

“…More recently the charge plunger method has been developed further in order to extend studies to nuclear states produced with low-production cross sections in nuclear reactions [11]. Here, the DPUNS plunger device [12] was used for improved control of the distance between the target and reset foils.…”

Section: Introductionmentioning

confidence: 99%

“…As in Ref. [11], it was not possible to resolve the Doppler-shifted components of the 4 + 1 → 2 + 1 257 keV feeding transition occurring before Fig. 1 Schematic diagram of the charge plunger method (upper) at target-to-reset foil distance x.…”

Section: Introductionmentioning

confidence: 99%

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Lifetime measurements of yrast states in $$^{\mathbf {178}}$$Pt using the charge plunger method with a recoil separator

et al. 2021

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Lifetime measurements in $$^{178}$$ 178 Pt with excited states de-exciting through $$\gamma $$ γ -ray transitions and internal electron conversions have been performed. Ionic charges were selected by the in-flight mass separator MARA and measured at the focal plane in coincidence with the $$4_1^+\rightarrow 2_1^+$$ 4 1 + → 2 1 + $$257\,$$ 257 keV $$\gamma $$ γ -ray transition detected using the JUROGAM 3 spectrometer. The resulting charge-state distributions were analysed using the differential decay curve method (DDCM) framework to obtain a lifetime value of 430(20) ps for the $$2_1^+$$ 2 1 + state. This work builds on a method that combines the charge plunger technique with the DDCM analysis. As an alternative analysis, ions were selected in coincidence with the $$^{178}$$ 178 Pt alpha decay ($$E_{\mathrm {alpha}} = 5.458(5)$$ E alpha = 5.458 ( 5 ) MeV) at the focal plane. Lifetime information was obtained by fitting a two-state Bateman equation to the decay curve with the lifetime of individual states defined by a single quadrupole moment. This yielded a lifetime value of 430(50) ps for the $$2_1^+$$ 2 1 + state, and 54(6) ps for the $$4_1^+$$ 4 1 + state. An analysis method based around the Bateman equation will become especially important when using the charge plunger method for the cases where utilising coincidences between prompt $$\gamma $$ γ rays and recoils is not feasible.

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Section: Introductionmentioning

confidence: 93%

“…As shown in Ref. [11], it is possible to use γ -ray coincidences with the charge plunger method and analyse the data in a DDCM framework. Figure 2a shows a rotational band level scheme.…”

Section: Ddcm Coincidence Analysismentioning

confidence: 99%

“…The mapping of the experimental observables to the number of T 1 transitions occurring after and before the reset foil is developed in Ref. [11] and the result is given here.…”

Section: Ddcm Coincidence Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations