Nuclear Data Sheets for A = 131

Khazov, Yu.L.; Mitropolsky, I. A.; Родионов, А. А.

doi:10.1016/j.nds.2006.10.001

Cited by 154 publications

(74 citation statements)

References 266 publications

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“…4(a)-4(g). The decay of the J π = 11/2 − 1 isomer is not observed due to its long half-life of 11.8 days [28]. Figure 4(a) presents the γ -ray spectrum with a gate on the 642-keV transition.…”

Section: Resultsmentioning

confidence: 99%

“…It has a half-life of 11.84(4) d and an excitation energy of 163.930 (8) keV. The isomer has a predominant νh −1 11/2 character and decays via an M4 γ ray to the J π = 3/2 + 1 ground state [28]. By the end of the 1970s, both Palmer et al [27] and Irving et al [29] studied low-lying positive-parity states in 131 Xe utilizing Coulomb excitation and (α,xnγ ) reactions, respectively.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-spin structure in the transitional nucleus Xe131 : Competitive neutron and proton alignment in the vicinity of the N=82 shell closure

Kaya¹,

Vogt²,

Reiter³

et al. 2018

Phys. Rev. C

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The transitional nucleus 131 Xe is investigated after multinucleon transfer in the 136 Xe + 208 Pb and 136 Xe + 238 U reactions employing the high-resolution Advanced γ -Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA at the Laboratori Nazionali di Legnaro, Italy, and as an elusive reaction product in the fusion-evaporation reaction 124 Sn( 11 B,p3n) 131 Xe employing the High-efficiency Observatory for γ -Ray Unique Spectroscopy (HORUS) γ -ray array coupled to a double-sided silicon strip detector at the University of Cologne, Germany. The level scheme of 131 Xe is extended to 5 MeV. A pronounced backbending is observed at hω ≈ 0.4 MeV along the negative-parity one-quasiparticle νh 11/2 (α = −1/2) band. The results are compared to the high-spin systematics of the Z = 54 isotopes and the N = 77 isotones. Large-scale shell-model calculations employing the PQM130, SN100PN, GCN50:82, SN100-KTH, and a realistic effective interaction reproduce the experimental findings and provide guidance to elucidate the structure of the high-spin states. Further calculations in 129−132 Xe provide insight into the changing nuclear structure along the Xe chain towards the N = 82 shell

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-spin structure in the transitional nucleus Xe131 : Competitive neutron and proton alignment in the vicinity of the N=82 shell closure

Kaya¹,

Vogt²,

Reiter³

et al. 2018

Phys. Rev. C

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“…The experimental data are taken from Refs. [17][18][19][20][21][22] besides orbitals in the 50-82 major shell. By introducing these negative parity orbitals, the first 1/2 + state is connected with negative parity 1/2 − states.…”

Section: Numerical Resultsmentioning

confidence: 99%

Shell Model Estimate of Electric Dipole Moments for Xe Isotopes

Teruya¹,

Yoshinaga²,

Higashiyama³

2015

Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014)

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“…No variance reduction techniques were used. The input photon-energy spectra used for the MCNPX simulations were obtained from the nuclear data sheets (14). Photons and particles were tracked, and the histories of those traveling through the crystal and their deposited energies were logged.…”

Section: Monte Carlo Simulationsmentioning

confidence: 99%

A Parallel-Cone Collimator for High-Energy SPECT

et al. 2015

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In SPECT using high-energy photon-emitting isotopes, such as 131 I, parallel-hole collimators with thick septa are required to limit septal penetration, at the cost of sensitivity and resolution. This study investigated a parallel-hole collimator with cone-shaped holes, which was designed to limit collimator penetration while preserving resolution and sensitivity. The objective was to demonstrate that a singleslice prototype of the parallel-cone (PC) collimator was capable of improving the image quality of high-energy SPECT. Methods: The image quality of the PC collimator was quantitatively compared with that of clinically used low-energy high-resolution (LEHR; for 99m Tc) and high-energy general-purpose (HEGP; for 131 I and 18 F) parallel-hole collimators. First, Monte Carlo simulations of single and double point sources were performed to assess sensitivity and resolution by comparing point-spread functions (PSFs). Second, a prototype PC collimator was used in an experimental phantom study to assess and compare contrast recovery coefficients and image noise. Results: Monte Carlo simulations showed reduced broadening of the PSF due to collimator penetration for the PC collimator as compared with the HEGP collimator (e.g., 0.9 vs. 1.4 cm in full width at half maximum for 131 I). Simulated double point sources placed 2 cm apart were separately detectable for the PC collimator, whereas this was not the case for 131 I and 18 F at distances from the collimator face of 10 cm or more for the HEGP collimator. The sensitivity, measured over the simulated profiles as the total amount of counts per decay, was found to be higher for the LEHR and HEGP collimators than for the PC collimator (e.g., 3.1 · 10 −5 vs. 2.9 · 10 −5 counts per decay for 131 I). However, at equal noise level, phantom measurements showed that contrast recovery coefficients were similar for the PC and LEHR collimators for 99m Tc but that the PC collimator significantly improved the contrast recovery coefficients as compared with the HEGP collimator for 131 I and 18 F. Conclusion: High-energy SPECT imaging with a single-slice prototype of the proposed PC collimator has shown the potential for significantly improved image quality in comparison with standard parallel-hole collimators. SPECTi maging using isotopes emitting high-energy gamma or bremsstrahlung photons has important applications in oncology and is used for both diagnosis and therapy monitoring. Examples of applications include radioisotope therapy (e.g., 131 I, 188 Re, and 67 Ga), monitoring of antibodies ( 111 In), and internal radiation therapy ( 90 Y and 166 Ho) (1-4). SPECT images are used for qualitative and quantitative purposes, both requiring high image resolution and low image noise. SPECT imaging of these high-energy photon-emitting isotopes remains a challenge, because broadening of the point-spread function (PSF) due to penetration of collimator septa by high-energy photons severely degrades image quality (5,6). Improvement of the quality of high-energy SPECT images is an important...

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Nuclear Data Sheets for A = 131

Cited by 154 publications

References 266 publications

High-spin structure in the transitional nucleus Xe131 : Competitive neutron and proton alignment in the vicinity of the N=82 shell closure

High-spin structure in the transitional nucleus Xe131 : Competitive neutron and proton alignment in the vicinity of the N=82 shell closure

Shell Model Estimate of Electric Dipole Moments for Xe Isotopes

A Parallel-Cone Collimator for High-Energy SPECT

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