First Observation of the Scissors Mode in a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">γ</mml:mi></mml:math>-Soft Nucleus: The Case of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>196</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>Pt

Brentano, P. von; Eberth, J.; Enders, J.; Esser, Lars; Herzberg, R.‐D.; Huxel, N.; Meise, H.; Neumann-Cosel, P. von; Nicolay, N.; Pietralla, N.; Prade, H.; Reif, J.; Richter, A.; Schlegel, C.; Schwengner, R.; Skoda, S.; Thomas, H. G.; Wiedenhöver, I.; Winter, G.; Zilges, A.

doi:10.1103/physrevlett.76.2029

Cited by 82 publications

(12 citation statements)

References 29 publications

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“…The measured ratio of the corresponding M1 strengths is 0.02, confirming the d-parity selection rule. A dominant E2 character of the 1 + sc → 2 + 1 transition in γ-soft nuclei was previously assumed for the interpretation of data for the nuclei 196 Pt [30] and 134 Ba [31]. Our measurement supports the earlier assumptions.…”

supporting

confidence: 90%

Transition Rates between Mixed Symmetry States: First Measurement in94Mo

et al. 1999

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The nucleus 94 Mo was investigated using a powerful combination of γ-singles photon scattering experiments and γγ-coincidence studies following the βdecay of 94m Tc. The data survey short-lived J π = 1 + , 2 + states and include branching ratios, E2/M 1 mixing ratios, lifetimes and transition strengths. The proton-neutron mixed-symmetry (MS) 1 + scissors mode and the 2 + MS state are identified from M 1 strengths. A γ transition between MS states was observed and its rate was measured. Nine M 1 and E2 strengths involving MS states agree with the O(6) limit of the Interacting Boson Model-2 using the proton boson E2 charge as the only free parameter.

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supporting

confidence: 90%

Transition Rates between Mixed Symmetry States: First Measurement in94Mo

et al. 1999

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“…In the vibrational U(5) limit, the 1 + ms state is expected to decay by magnetic dipole transitions dominantly to the two-phonon states, whereas the dipole transition from this state to the ground state is inhibited. This transition is possible as a result of the nonvanishing expectation value for the d-boson number in the ground state as observed for many γ -soft O(6) nuclei [46][47][48]. The strong M1 transitions from the 1 + ms state to the ground state as observed in the Cd nuclei can be explained in terms of these nuclei exhibiting both U (5) and O(6) symmetries.…”

Section: Isovector Dipole Excitation In 114 CDmentioning

confidence: 83%

Investigation of phonon excitations inCd114with the(n,n'
Bandyopadhyay
¹
,
Lesher
²
,
Fransen
³

et al. 2007
Phys. Rev. C
36
3
19
0
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Properties of low-spin states in 114 Cd have been studied with the (n, n γ ) reaction. Gamma-ray angular distributions and excitation functions have been used to characterize the decays of the excited levels. Level lifetimes have been obtained with the Doppler-shift attenuation method. Sixteen new levels and many new transitions have been suggested below 3.5 MeV in excitation energy. Levels belonging to the phonon multiplets have been proposed based on their decay patterns and collectivity, and the existing intruder structure has been extended. A two-phonon 1 + ms state has been suggested. Excitation of the hexadecapole moment has been considered. Data have been compared with the theoretical calculations of the interacting boson model.

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“…The orbital mode 1 + states has been found for the isotopes with permanent deformation in a wide region beginning from light nuclei (such as 46 Ti) up to the actinides, including also transitional and γ-soft nuclei. [6][7][8][9][10][11][12][13] The remarkable features of the scissors mode obtained from experimental results are the quadratic dependence of the summed B(M1) values on the ground state deformation parameter δ and the strong fragmentation of the M1 strength above the pairing gap up to 4 MeV excitation energy. [14][15][16] There exists a strong correlation between the B(E2, 0 + 1 → 2 + 1 0) strength and summed B(M1) strengths and saturation of these strengths at midshell.…”

Section: Introductionmentioning

confidence: 99%

ROTATIONAL-INVARIANT MODEL OF THE STATES WITH K^π=1⁺ AND THEIR CONTRIBUTION TO THE SCISSORS MODE

Kuliev

Akkaya

Ilhan

et al. 2000

Int. J. Mod. Phys. E

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Within the Random-Phase Approximation the method of self-consistent determination of the isoscalar and isovector effective separable interactions restoring a broken symmetry of the deformed mean-field is given. The method allows to treat more rigorously without free parameters the properties of the scissors mode and is used to develop the rotational invariant microscopic model of the states with K π = 1 + . The spurious state separates out and has zero energy. An important consequence of this separation is the fragmentation of the scissors mode and the collectivization of the low-lying 1 + states. In addition to the isoscalar restoring interactions the consideration of the isovector restoring forces in calculations causes the splitting of the states with large B(M1) strength at low energy. The model contains a single parameter of isovector spin-spin interactions and it allows one to describe satisfactorily the fragmentation of the scissors mode and the dependence of the summed B(M1) strength on δ 2 and A in deformed nuclei.

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First Observation of the Scissors Mode in aγ-Soft Nucleus: The Case of196Pt

Cited by 82 publications

References 29 publications

Transition Rates between Mixed Symmetry States: First Measurement in94Mo

Transition Rates between Mixed Symmetry States: First Measurement in94Mo

Investigation of phonon excitations inCd114with the(n,n'
Bandyopadhyay
¹
,
Lesher
²
,
Fransen
³

et al. 2007
Phys. Rev. C
36
3
19
0
View full text Add to dashboard Cite

ROTATIONAL-INVARIANT MODEL OF THE STATES WITH K^π=1⁺ AND THEIR CONTRIBUTION TO THE SCISSORS MODE

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First Observation of the Scissors Mode in aγ-Soft Nucleus: The Case of196Pt

Cited by 82 publications

References 29 publications

Transition Rates between Mixed Symmetry States: First Measurement in94Mo

Transition Rates between Mixed Symmetry States: First Measurement in94Mo

Investigation of phonon excitations inCd114with the(n,n'Bandyopadhyay1, Lesher2, Fransen3 et al. 2007Phys. Rev. C363190View full textAdd to dashboardCite

ROTATIONAL-INVARIANT MODEL OF THE STATES WITH Kπ=1+ AND THEIR CONTRIBUTION TO THE SCISSORS MODE

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Product

Resources

About

Investigation of phonon excitations inCd114with the(n,n'
Bandyopadhyay
¹
,
Lesher
²
,
Fransen
³

et al. 2007
Phys. Rev. C
36
3
19
0
View full text Add to dashboard Cite

ROTATIONAL-INVARIANT MODEL OF THE STATES WITH K^π=1⁺ AND THEIR CONTRIBUTION TO THE SCISSORS MODE