Nuclear Data Sheets Update for A = 133

Rab, Shaheen

doi:10.1006/ndsh.1995.1030

Cited by 72 publications

(16 citation statements)

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“…As is expected, the energy spectrum for the two sources clearly shows the contributions of the multiple prominent γ -ray emission lines 161, 276, 302, 356 and 384 keV of the 133 Cs daughter of the 133 Ba decay (Rab 1995). Figure 6 shows the energy spectra for the 176 Lu activity present in the LSO scintillator crystals with and without a 35 kBq 68 Ge source.…”

Section: Resultssupporting

confidence: 75%

A method for measuring the energy spectrum of coincidence events in positron emission tomography

2009

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Positron emission tomography (PET) system energy response is typically characterized in singles detection mode, yet there are situations in which the energy spectrum of coincidence events might be different than the spectrum measured in singles mode. Examples include imaging with isotopes that emit a prompt gamma in coincidence with a positron emission, imaging with low activity in a LSO/LYSO-based cameras, in which the intrinsic activity is significant, and in high scatter situations where the two 511 keV photons have different scattering probabilities (i.e. off-center line source). The ability to accurately measure the energy spectrum of coincidence events could be used for validating simulation models, optimizing energy discriminator levels and examining scatter models and corrections. For many PET systems operating in coincidence mode, the only method available for estimating the energy spectrum is to step the lower and upper level discriminators (LLD and ULD). Simple measurement techniques such as using a narrow sliding energy window or stepping only the LLD will not yield a spectrum of coincidence events that is accurate for cases where there are different energy components contributing to the spectrum. In this work we propose a new method of measuring the energy spectrum of coincidence events in PET based on a linear combination of two sets of coincident count measurements: one made by stepping the LLD and one made by stepping the ULD. The method was tested using both Monte Carlo simulations of a Siemens microPET R4 camera and measured data acquired on a Siemens Inveon PET camera. The results show that our energy spectrum calculation method accurately measures the coincident energy spectra for cases including the beta/gamma spectrum of the 176Lu intrinsic activity present in the LSO scintillator crystals, a 68Ge source and an 124I source (in which there are prompt γ-rays emitted together with the positron).

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Section: Resultssupporting

confidence: 75%

A method for measuring the energy spectrum of coincidence events in positron emission tomography

2009

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“…with those of the shell model (PTSM) for (a) 135 Xe, (b) 133 Xe, (c) 131 Xe, and (d)129 Xe. The experimental data are taken from Refs [28][29][30][31][32]…”

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confidence: 99%

Nuclear Schiff moments for the lowest1/2+states in Xe isotopes

et al. 2013

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The electric dipole moment of a neutral atom is mainly induced by the nuclear Schiff moment. The nuclear wave functions beyond mean-field theories are calculated in terms of the nuclear shell model, which contains two-body interactions violating parity and time-reversal invariance. Using wave functions thus obtained, the Schiff moments for the lowest 1/2 + states of Xe isotopes are calculated. The upper limit for the electric dipole moment of the 129 Xe neutral atom is estimated using its nuclear Schiff moment.

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“…The β-delayed proton decay of 133 Sm has been observed, the ground-state spin and parity of 133 Sm have been suggested as 5/2 + preliminarily by Bogdanov et al [1] and Wilmarth et al [2], and its half-life has been evaluated to be 3.7 ± 0.7 s [3,4]. The β-delayed proton decay of 133 Sm has been observed, the ground-state spin and parity of 133 Sm have been suggested as 5/2 + preliminarily by Bogdanov et al [1] and Wilmarth et al [2], and its half-life has been evaluated to be 3.7 ± 0.7 s [3,4].…”

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confidence: 86%

(EC + β+) decay of 133Sm and 1.1 s isomer of 133Pr

et al. 2001

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The very neutron-deficient isotope 133 Sm was produced by irradiation of an enriched target of 96 Ru with 40 Ca and studied by using a helium-jet fast tape transport system in combination with X-γ and γ-γ coincidence measurements. A simple (EC + β + ) decay scheme of 133 Sm was proposed for the first time. As a by-product 133 Pr was produced simultaneously because of the 98-102 Ru content of the ruthenium target. The half-life of a 11/2 − low-lying isomeric state in 133 Pr was measured to be 1.1 ± 0.2 s. PACS. 23.40.-s Beta decay; double beta decay; electron and muon capture -21.10.Tg Lifetimes -27.60.+j 90 ≤ A ≤ 149

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Nuclear Data Sheets Update for A = 133

Cited by 72 publications

References 0 publications

A method for measuring the energy spectrum of coincidence events in positron emission tomography

A method for measuring the energy spectrum of coincidence events in positron emission tomography

Nuclear Schiff moments for the lowest1/2+states in Xe isotopes

(EC + β+) decay of 133Sm and 1.1 s isomer of 133Pr

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