Nuclear Data Sheets for A=217

Kondev, F. G.; McCutchan, E. A.; Singh, Balraj; Banerjee, K.; Bhattacharya, S.; Chakraborty, A.; Garg, Swati; Jovančević, N.; Kumar, Sushil; Rathi, Sonika; Roy, Tufan; Lee, Jounghwa; Shearman, R.

doi:10.1016/j.nds.2018.01.002

Cited by 11 publications

(10 citation statements)

References 87 publications

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“…Actinium-225 is a promising candidate for new alpha-emitting therapeutic radio-pharmaceuticals [5]. Actinium-225 has a relatively short half-life of 9.9203 (3) days, and decays to 209 Bi (stable) through the emission of 4 α and 2 β − particles [6][7][8][9][10]. The short range of these α particles is prized for sparing nearby healthy tissue while delivering a lethal dose to the site of disease [11].…”

Section: I1 Motivationmentioning

confidence: 99%

Measurement of 139La(p,x) cross sections from 35–60 MeV by stacked-target activation

et al. 2020

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A stacked-target of natural lanthanum foils (99.9119% 139 La) was irradiated using a 60 MeV proton beam at the LBNL 88-Inch Cyclotron. 139 La(p,x) cross sections are reported between 35-60 MeV for nine product radionuclides. The primary motivation for this measurement was the need to quantify the production of 134 Ce. As a positron-emitting analogue of the promising medical radionuclide 225 Ac, 134 Ce is desirable for in vivo applications of bio-distribution assays for this emerging radio-pharmaceutical. The results of this measurement were compared to the nuclear model codes TALYS, EMPIRE and ALICE (using default parameters), which showed significant deviation from the measured values. arXiv:1907.04431v2 [nucl-ex]

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Section: I1 Motivationmentioning

confidence: 99%

Measurement of 139La(p,x) cross sections from 35–60 MeV by stacked-target activation

et al. 2020

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“…Spins and parities have been tentatively assigned to the populated excited states in 215 Rn [17] and 217 Ra [22]. Even though (7/2) + and (11/2 + ) are assigned to the 315 keV level in 215 Rn and 333 keV level in 217 Ra, respectively, both spins are possible for each of them.…”

Section: Discussionmentioning

confidence: 99%

“…Figure3: The α-decay schemes of N = 131 isotones 219 Ra[17],221 Th[22] and223 U deduced in this study. The 244(23) keV excited state observed in the α decay of223 U was proposed to be the counterpart of the (7/2 + ) and (11/2 + ) excited states in215 Rn (and 217 Ra).…”

mentioning

confidence: 99%

Fine structure in the $α$ decay of $^{223}$U

Sun,

Liu,

Huang

et al. 2019

Preprint

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Fine structure in the α decay of 223 U was observed in the fusion-evaporation reaction 187 Re( 40 Ar, p3n) by using fast digital pulse processing technique. Two α-decay branches of 223 U feeding the ground state and 244 keV excited state of 219 Th were identified by establishing the decay chain 223 URn. The α-particle energy for the ground-state to ground-state transition of 223 U was determined to be 8993(17) keV, 213 keV higher than the previous value, the half-life was updated to be 62 +14 −10 µs. Evolution of nuclear structure for N = 131 even-Z isotones from Po to U was discussed in the frameworks of nuclear mass and reduced α-decay width, a weakening octupole deformation in the ground state of 223 U relative to its lighter isotones 219 Ra and 221 Th was suggested.

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“…1; the data are taken from Refs. [12,[25][26][27]. The α decays of the two isotopes studied here were selected by identifying chains of three or four consecutive signals in a single DSSD pixel.…”

Section: A α-Decay Selectionmentioning

confidence: 99%

“…This was due to the very short half-lives of N = 128 nuclei in the region (T 1/2 < 300 ns), and the shaping time of the DSSD energy amplifiers, which was set to be 500 ns. A detailed description of α-decay sum-energy spectroscopy is given [12,[25][26][27]. The figure gives α-particle energies, in keV, and branching ratios of the decays, as well as the half-lives of the α-decaying ground states.…”

Section: A α-Decay Selectionmentioning

confidence: 99%

Single-particle states and parity doublets in odd- Z Ac221 and Pa225 from
Parr¹,
Smith²,
Greenlees³
et al. 2022
Phys. Rev. C
5
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Low-lying states in the odd-Z isotopes 221 89 Ac 132 and 225 91 Pa 134 have been studied using α-particle and αγcoincidence spectroscopy in the 225 Pa → 221 Ac → 217 Fr decay chain. Ground-state spin and parity assignments of I π = 5/2 − are proposed for both 221 Ac and 225 Pa, with the odd proton occupying the = 5/2 orbital of the quadrupole-octupole deformed shell model in both nuclei. In 221 Ac, excited states in the bands based on the = 5/2 and = 3/2 orbitals have been identified, including proposed parity-doublet states. The results suggest that reflection-asymmetric deformation of the ground state persists in the odd-A members of the isotope chains down to N = 132 for Ac and N = 134 for Pa, before reaching the transitional region at N = 130.

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Nuclear Data Sheets for A=217

Cited by 11 publications

References 87 publications

Measurement of 139La(p,x) cross sections from 35–60 MeV by stacked-target activation

Measurement of 139La(p,x) cross sections from 35–60 MeV by stacked-target activation

Fine structure in the $α$ decay of $^{223}$U

Single-particle states and parity doublets in odd- Z Ac221 and Pa225 from
Parr¹,
Smith²,
Greenlees³
et al. 2022
Phys. Rev. C
5
0
0
0
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Nuclear Data Sheets for A=217

Cited by 11 publications

References 87 publications

Measurement of 139La(p,x) cross sections from 35–60 MeV by stacked-target activation

Measurement of 139La(p,x) cross sections from 35–60 MeV by stacked-target activation

Fine structure in the $α$ decay of $^{223}$U

Single-particle states and parity doublets in odd- Z Ac221 and Pa225 from Parr1, Smith2, Greenlees3 et al. 2022Phys. Rev. C5000View full textAdd to dashboardCite

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Single-particle states and parity doublets in odd- Z Ac221 and Pa225 from
Parr¹,
Smith²,
Greenlees³
et al. 2022
Phys. Rev. C
5
0
0
0
View full text Add to dashboard Cite