Level lifetimes in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">P</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>32</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>obtained using the Doppler-shift attenuation method with thick molecular targets

Bhattacharjee, Ramendu; Bhattacharjee, S. S.; Basu, Kanad; Rajesh, Puspalata; Raut, R.; Ghugre, S. S.; Das, Dipankar; Sinha, A. K.; Chaturvedi, L.; Garg, U.; Ray, S.; Yogi, B. K.; Raju, M. Kumar; Chakrabarti, R.; Mukhopadhyay, S.; Dhal, A.; Singh, R. P.; Madhavan, N.; Muralithar, S.

doi:10.1103/physrevc.90.044319

Cited by 14 publications

(10 citation statements)

References 18 publications

(35 reference statements)

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“…As already mentioned in the preceding discussions, observation of Doppler shapes / shifts in the γ-transition peaks of 29 Si, enabled extraction of the corresponding level lifetimes using the DSAM technique. The modified LINESHAPE package [9] has been used for the purpose. Least square fitting of the observed shapes to the calculated ones have been carried out simultaneously at five different angles, 148 • , 123 • , 90 • , 57 • , 32 • , for determination of the level lifetimes.…”

Section: Resultsmentioning

confidence: 99%

“…The analysis of the shapes / shifts has been carried out using the LINESHAPE [24] package modified for DSAM with a thick molecular target, as detailed in Ref. [9]. The slowing down of the residue of interest in the thick Ta 2 O 5 target has been simulated using the stopping powers calculated using the SRIM [25] software.…”

Section: Levelsmentioning

confidence: 99%

“…The associated theoretical studies have also been zealously pursued in conjunction with the experimental endeavours, particularly within the purview of the nuclear shell model. Shell model calculations in this region have resorted to adhoc adjustments [7] in the single particle energies while calculations with updated interactions [8] and reasonable configuration space have indicated such modifications to be inessential [9].…”

Section: Introductionmentioning

confidence: 99%

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Spectroscopy and shell model calculations in Si isotopes

Bhattacharjee

Raut

et al. 2015

Phys. Rev. C

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The 29 Si nucleus has been studied using heavy-ion induced fusion-evaporation reaction and, for the first time, using a large array of high resolution γ-ray detectors. High spin states of the nucleus have been populated using 18 O( 16 O,αn) and 18 O( 13 C,2n) reactions at E lab = 30-34 MeV. Previously reported levels have been confirmed and a new level has been identified in the present study. Spin-parity assignments have been carried out based on the anisotropy and polarization measurements of the observed γ-transitions. Level lifetimes have been measured using Doppler Shift Attenuation Method (DSAM), with modified analysis techniques for the thick molecular target (Ta2O5) used in the present setup. Lifetime of the lowest negative parity state at Ex = 3624 keV has been substantially modified from the previously reported value. Large basis shell model calculations have been carried out for the nucleus using updated interactions and the results corroborate the experimental findings. The calculations have also been carried out for the neighbouring 28,30 Si isotopes. In case of the 28 Si nucleus, the calculations adequately reproduce most of the deformed structures, as represented by the quadrupole moments extracted therefrom. In the 30 Si nucleus, the negative parity states have been reproduced for the first time without any ad hoc lowering of the single particle energies. It can be generally stated that the shell model calculations adequately describe the experimental observations in these nuclei.

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Section: Resultsmentioning

confidence: 99%

Section: Levelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spectroscopy and shell model calculations in Si isotopes

Bhattacharjee

Raut

et al. 2015

Phys. Rev. C

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“…This evolving cross section was taken into account for simulation of the slowing down process of the recoil in the target and the backing media (both Al, in this case) using a modified version of the DECHIST code within the LINESHAPE package. The modification also included use of updated and experimentally benchmarked stopping powers from the SRIM program [24]. The subsequent steps in the Doppler shape analysis were carried out following the conventional methodology as outlined in Ref.…”

Section: Lifetime Analysismentioning

confidence: 99%

“…The subsequent steps in the Doppler shape analysis were carried out following the conventional methodology as outlined in Ref. [24].…”

Section: Lifetime Analysismentioning

confidence: 99%

High spin γ -ray spectroscopy in Ca41

et al. 2016

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High spin states in41 Ca have been investigated using γ-ray spectroscopic techniques following the 27 Al(16 O,pn) 41 Ca fusion-evaporation reaction. Around twelve new transitions belonging to 41 Ca, have been observed, and placed in the level scheme, which now has been extended up to Ex ∼ 9 MeV. The spin-parity assignments for the observed levels were arrived at following the analysis of both the coincidence intensity anisotropies and linear polarization measurements. The established 5p-4h band was extended upto J π = 19/2 − . The observations of Doppler shape and shifts facilitated the estimation of the level lifetimes using the Doppler Shift Attenuation Method. The lifetimes were validated with respect to previous measurements and lifetime of a few levels has been arrived at for the first time. Shell model calculations were carried out to explain the observed level structure of the nucleus and are indicative of both single particle and collective degrees of freedom in this N ∼ Z ∼ 20 nucleus.

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The Practice of Gamma-Ray Spectroscopy: Here and Now

Raut

2023

Springer Proceedings in Physics

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Level lifetimes inP32obtained using the Doppler-shift attenuation method with thick molecular targets

Cited by 14 publications

References 18 publications

Spectroscopy and shell model calculations in Si isotopes

Spectroscopy and shell model calculations in Si isotopes

High spin γ -ray spectroscopy in Ca41

The Practice of Gamma-Ray Spectroscopy: Here and Now

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