Collectivity of the intruder bands in 114Sn

Gableske, J.; Dewald, Α.; Tiesler, H.; Wilhelm, Michael; Klemme, T.; Vogel, O.; Schneider, I.; Peusquens, R.; Kasemann, S.; Zell, K. O.; Brentano, P. von; Petkov, P.; Bazzacco, D.; Alvarez, C. Rossi; Lunardi, S.; Angelis, G. de; Poli, M.; Fahlander, C.

doi:10.1016/s0375-9474(01)00564-4

Cited by 33 publications

(13 citation statements)

References 18 publications

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“…2819.6(10) * 100 ( In general, the lifetimes determined in this work are in excellent agreement with lifetimes reported in Refs. [11,12,35,37] and also the lower limits found are in good agreement with previously known lifetimes, see, e.g., τ 2 + 2 and τ 4 + 1 in Table II.…”

Section: Resultssupporting

confidence: 91%

“…Many experiments have been performed to study the positive-parity and negative-parity intruder bands in 112,114 Sn, see, e.g., Refs. [37,[50][51][52]. We were now able to establish the 0 + , 2 + and 4 + members of the positive-parity intruder configuration in 112,114 Sn, see Figure 7.…”

Section: Snmentioning

confidence: 73%

“…[35] and the data for the intruder 6 + state was taken from Ref. [37]. The 110 Pd and 118 Xe was taken from Ref.…”

Section: Snmentioning

confidence: 99%

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Shape coexistence and collective low-spin states in Sn112,114 studied with the (p,p′γ
Spieker
¹
,
Petkov
²
,
Литвинова
³

et al. 2018
Phys. Rev. C
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Background: The semi-magic Sn (Z = 50) isotopes have been subject to many nuclear-structure studies. Signatures of shape coexistence have been observed and attributed to two-proton-two-hole (2p-2h) excitations across the Z = 50 shell closure. In addition, many low-lying nuclear-structure features have been observed which have effectively constrained theoretical models in the past. One example are so-called quadrupole-octupole coupled states (QOC) caused by the coupling of the collective quadrupole and octupole phonons. Purpose: Proton-scattering experiments followed by the coincident spectroscopy of γ rays have been performed at the Institute for Nuclear Physics of the University of Cologne to excite low-spin states in 112 Sn and 114 Sn, to determine their lifetimes and extract reduced transitions strengths B(ΠL). Methods: The combined spectroscopy setup SONIC@HORUS has been used to detect the scattered protons and the emitted γ rays of excited states in coincidence. The novel (p, p ′ γ) DSA coincidence technique was employed to measure sub-ps nuclear level lifetimes. Results: 74 level lifetimes τ of states with J = 0 − 6 were determined. In addition, branching ratios were deduced which allowed the investigation of the intruder configuration in both nuclei. Here, sd IBM-2 mixing calculations were added which support the coexistence of the two configurations. Furthermore, members of the expected QOC quintuplet are proposed in 114 Sn for the first time. The 1 − candidate in 114 Sn fits perfectly into the systematics observed for the other stable Sn isotopes. Conclusions: The E2 transition strengths observed for the low-spin members of the so-called intruder band support the existence of shape coexistence in 112,114 Sn. The collectivity in this configuration is comparable to the one observed in the Pd nuclei, i.e. the 0p-4h nuclei. Strong mixing between the 0 + states of the normal and intruder configuration might be observed in 114 Sn. The general existence of QOC states in 112,114 Sn is supported by the observation of QOC candidates with J = 1.

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Section: Resultssupporting

confidence: 91%

Section: Snmentioning

confidence: 73%

See 1 more Smart Citation

Shape coexistence and collective low-spin states in Sn112,114 studied with the (p,p′γ
Spieker
¹
,
Petkov
²
,
Литвинова
³

et al. 2018
Phys. Rev. C
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18
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1
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“…[10] have a very low recoil velocity and the measured average Doppler shift is insensitive to the nuclear lifetime. In 114 Sn the Cologne group measured τ (2 + 1 )=0.56(11) ps performing a DDCM (differential decay curve method) coincidence analysis of plunger data [24]. Finally, a DSA value of τ (2 + 1 )=0.45(15) ps has been reported for 114 Sn in Ref.…”

mentioning

confidence: 94%

New lifetime measurements in the stable semimagic Sn isotopes using the Doppler-shift attenuation technique

Jungclaus

Walker

Leske

et al. 2011

J. Phys.: Conf. Ser.

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“…Quasiparticle Routhians, calculated with a quadrupole deformation of β 2 = 0.32 (obtained experimentally in the present work) and γ = 0 • (hexadecapole deformation was assumed to be zero) also show that the first band crossing is due to the alignment of a pair of h 11/2 neutrons and occurs at a frequency ω ∼ 0.45 MeV. The first crossing however occurs at a frequency 0.09 MeV higher relative to the core nucleus 112 Sn and with a larger interaction strength than the known neutron h 11/2 alignments in 110,112,114 Sn [8,21,22]. The deformation obtained for the band is the largest reported in this mass region with Z close to the shell-closure.…”

Section: Resultsmentioning

confidence: 94%

Experimental study of the πh 11/2 band in 113Sb

Ganguly¹,

Banerjee

Dey

et al. 2011

Pramana - J Phys

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In the present work, the excited states of 113 Sb were populated in the 100 Mo( 20 Ne, p6n) reaction at a beam energy of 136 MeV. States only up to 59/2 − were observed in the J = 2 band. Mean lifetimes for the five states (from 4460 to 7998 keV) were measured for the first time using Doppler shift attenuation method. An upper limit of the lifetime (0.14 ps) was estimated for the 9061 keV, 47/2 − state. The B(E2) values, derived from the present lifetime results, correspond to a large quadrupole deformation of β 2 = 0.32. The observed reduction in the experimental B(E2) values for the 918.4 keV (spin 39/2 − → 35/2 − ) and 985 keV (spin 43/2 − → 39/2 − ) transitions may be interpreted as due to the proton alignement in the g 7/2 orbital. The dynamic moment of inertia was observed to be about half of the rigid body value at the highest observed frequency.

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Collectivity of the intruder bands in 114Sn

Cited by 33 publications

References 18 publications

Shape coexistence and collective low-spin states in Sn112,114 studied with the (p,p′γ
Spieker
¹
,
Petkov
²
,
Литвинова
³

et al. 2018
Phys. Rev. C
Self Cite
18
0
20
1
View full text Add to dashboard Cite

Shape coexistence and collective low-spin states in Sn112,114 studied with the (p,p′γ
Spieker
¹
,
Petkov
²
,
Литвинова
³

et al. 2018
Phys. Rev. C
Self Cite
18
0
20
1
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New lifetime measurements in the stable semimagic Sn isotopes using the Doppler-shift attenuation technique

Experimental study of the πh 11/2 band in 113Sb

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Collectivity of the intruder bands in 114Sn

Cited by 33 publications

References 18 publications

Shape coexistence and collective low-spin states in Sn112,114 studied with the (p,p′γSpieker1, Petkov2, Литвинова3 et al. 2018Phys. Rev. CSelf Cite180201View full textAdd to dashboardCite

Shape coexistence and collective low-spin states in Sn112,114 studied with the (p,p′γSpieker1, Petkov2, Литвинова3 et al. 2018Phys. Rev. CSelf Cite180201View full textAdd to dashboardCite

New lifetime measurements in the stable semimagic Sn isotopes using the Doppler-shift attenuation technique

Experimental study of the πh 11/2 band in 113Sb

Contact Info

Product

Resources

About

Shape coexistence and collective low-spin states in Sn112,114 studied with the (p,p′γ
Spieker
¹
,
Petkov
²
,
Литвинова
³

et al. 2018
Phys. Rev. C
Self Cite
18
0
20
1
View full text Add to dashboard Cite

Shape coexistence and collective low-spin states in Sn112,114 studied with the (p,p′γ
Spieker
¹
,
Petkov
²
,
Литвинова
³

et al. 2018
Phys. Rev. C
Self Cite
18
0
20
1
View full text Add to dashboard Cite