Low- and medium-spin states in 204Po

Rahkonen, V.; Lönnroth, T.

doi:10.1016/0375-9474(87)90304-6

Cited by 12 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The line-shape fit of the 576-keV (2 + 2 → 2 + 1 ) transition is shown in Fig. 3 (a) and the lifetime of the 2 + 2 state is determined to be 1.24 (18) ps. In the line-shape fit of the 1263-keV (2 + 2 → 0 + 1 ) transition an unidentified contaminant with E γ = 1258 keV had to be fitted simultaneously with the 1263-keV line.…”

Section: Data Analysis and Resultsmentioning

confidence: 99%

“…[17] which is based on the α K conversion coefficients obtained in Ref. [18]). If we assume δ = 0, the upper limit of the B(M 1) transition strength is extracted to be B(M 1; 2 Within the present experiment the lifetimes of two additional levels of the nucleus 208 Po were measured as well.…”

Section: Data Analysis and Resultsmentioning

confidence: 99%

“…[17] which is based on the α K conversion coefficients obtained in Ref. [18]). The only missing piece of experimental information is the lifetime of the 2 + 2 excited state of 208 Po, which, if the state is indeed the expected MSS, should be short in order to yield a sizable M1 strength to the 2 + 1 state.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental evidence for low-lying quadrupole isovector excitation of $$^{208}$$Po

et al. 2020

View full text Add to dashboard Cite

We present the results from an experiment dedicated to measure the lifetime of the 2 + 2 state, candidate for the one-phonon mixed-symmetry state, of 208 Po. This nucleus was studied in the α-transfer reaction 204 Pb( 12 C, 8 Be) 208 Po and the lifetime of the 2 + 2 state was determined by utilizing the Doppler-shift attenuation method. The experimental data show that the 2 + 2 state decays with a sizable M 1 transition to the 2 + 1 state revealing its isovector nature. Keywords Lifetimes • Electromagnetic transitions • Transfer reactions • 190≤ A ≤219

show abstract

Section: Data Analysis and Resultsmentioning

confidence: 99%

Section: Data Analysis and Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental evidence for low-lying quadrupole isovector excitation of $$^{208}$$Po

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The nuclear structure of the Z = 84 Po isotopes has been studied [1][2][3] from the N= 126 closed shell down to N= 114, the 198po nucleus, where fission competition begins to make heavy-ion fusion-evaporation studies difficult. For this reason, the search for the onset of collectivity involving the quadrupole and octupole degrees of freedom in the surrounding region is of particular interest both experimentally and theoretically.…”

Section: Introductionmentioning

confidence: 99%

Quadrupole and octupole collectivity in light Po isotopes

Alber

Alfier

Bach

et al. 1991

Z. Physik A - Hadrons and Nuclei

View full text Add to dashboard Cite

The level structure of 196po has been studied using a ~6~176 4n) reaction and a recoil-catcher technique to reduce fission. The results showed a sharp drop off in the first (2 +) and (4 +) energies relative to systematics implying an abrupt increase in the quadrupole collectivity at N = 112. In addition, second (2 +) and (4 +) states were identified at 859 and 1388 keV, respectively, suggesting the discovery of a 4p2h deformed band in Po isotopes which is related to known 2p2h proton bands in several Pb isotopes. A prompt la3W(Z~ 5n) experiment located similar second 2 + and 4 + states at 1039 and 1483 keV in ~98po providing corroboration and extended information on the properties of the new Po deformed bands. A measured halflife of 850 (90) ns for the 2491 keV (11-) state in ~96po implied collective E3 contributions to the extracted B (E3; 11 -~ 8 + ) = 27(5) W.u..

show abstract

“…These measurements are pivoted on the E2 assignment of the 632 keV ground state transition, which follows from the systematics in the neighbouring nuclei, including Francium isotopes. Based on our DCO results, ∆J = 0 E1 character was assigned to the 194 keV isomeric [24] transition. The same transition was assigned E1(10 − → 9 + ) in Ref.…”

Section: Interpretation Of Resultsmentioning

confidence: 86%

Observation of isomeric decays and the high spin states in doubly-odd 208Fr

Kanjilal,

Bhattacharya,

Goswami

et al. 2009

Preprint

View full text Add to dashboard Cite

Neutron deficient isotopes of Francium (Z=87, N ∼ 121 − 123) as excited nuclei were produced in the fusionevaporation reaction: 197 Au ( 16 O, xn) 213−x Fr at 100 MeV. The γ rays from the residues were observed through the high sensitivity Germanium Clover detector array INGA. The decay of the high spin states and the isomeric states of the doubly-odd 208 Fr nuclei, identified from the known sequence of ground state transitions, were observed. The half lives of the E γ = 194(2) keV isomeric transition, known from earlier observations, was measured to be T 1/2 = 233(18) ns. A second isomeric transition at E γ = 383(2) keV and T 1/2 = 33(7) ns was also found. The measured half lives were compared with the corresponding single particle estimates, based on a the level scheme obtained from the experiment.

show abstract

Low- and medium-spin states in 204Po

Cited by 12 publications

References 16 publications

Experimental evidence for low-lying quadrupole isovector excitation of $$^{208}$$Po

Experimental evidence for low-lying quadrupole isovector excitation of $$^{208}$$Po

Quadrupole and octupole collectivity in light Po isotopes

Observation of isomeric decays and the high spin states in doubly-odd 208Fr

Contact Info

Product

Resources

About