Nuclear Data Sheets for A = 51

Wang, Jimin; Huang, Xiaolong

doi:10.1016/j.nds.2017.08.002

Cited by 28 publications

(19 citation statements)

References 280 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The short half-life of the 52m Mn isomer (t 1/2 = 21.1 ± 0.2 min) makes production and handling difficult, and with a high-intensity gamma emission (1434.06 keV, I γ = 98.2 ± 0.5%), 52m Mn is similarly undesirable for clinical applications [8]. In contrast, 51 Mn (t 1/2 = 46.2 ± 0.1 min, I β + = 96.86%, E β, avg = 0.964 MeV [4,9]), is more clinically suitable for rapid metabolic studies. 51 Mn lacks any strong decay gamma-rays (its longer-lived daughter 51 Cr [t 1/2 = 27.704 ± 0.003 d] has only a single 320.0284 keV [I γ = 9.910 ± 0.010%] line), making it the best choice of these radionuclides for clinical imaging.…”

Section: Supplementary Informationmentioning

confidence: 99%

“…In addition to their interest for PET studies, the 51,52g,52m Mn excitation functions offer an opportunity to study the distribution of angular momentum in compound nuclear and direct pre-equilibrium reactions via observation of the 52m Mn (t 1/2 = 21.1 ± 0.2 min; J π = 2 + ) to 52g Mn (t 1/2 = 5.591 ± 0.003 d; J π = 6 + ) ratio [8,9]. Measurements of isomer-to-ground state ratios have been used for over 20 years to probe the spin distribution of excited nuclear states in the A ≈ 190 region [14,15].…”

Section: (): V-volmentioning

confidence: 99%

“…The net counts in each fitted gamma-ray photopeak were converted into activities for the decaying activation products. The half-lives and gamma-ray branching ratios used for all calculations of measured cross sections reported in this work have been taken from the most recent edition of Nuclear Data Sheets for each mass chain [4,8,9,[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Corrections (typically <0.2%) for gamma-ray attenuation within each foil packet were made, using photon attenuation coefficients from the XCOM photon cross sections database [37].…”

Section: Quantification Of Induced Activitiesmentioning

confidence: 99%

“…nat Fe(p,x) 51 Mn could be used for production of 51 Mn (≥98.8% radioisotopic purity) below 20 MeV using the 54 Fe(p,α) 51 Mn channel. In addition, this low-energy production is accessible using the international network of small medical and research cyclotrons, enabling in-house production of this short-lived (t 1/2 = 46.2 ± 0.1 m [9]) radionuclide. To increase yields over nat Fe(p,x), an enriched 54 Fe target could be used to take advantage of the eight-fold increase in reaction cross section for production using 40-50 MeV protons without opening the additional manganese exit channels accessible on a natural target.…”

Section: S T a C Ki Dmentioning

confidence: 99%

See 3 more Smart Citations

Proton-induced reactions on Fe, Cu, and Ti from threshold to 55 MeV

et al. 2021

View full text Add to dashboard Cite

Theoretical models often differ significantly from measured data in their predictions of the magnitude of nuclear reactions that produce radionuclides for medical, research, and national security applications. In this paper, we compare a priori predictions from several state-of-the-art reaction modeling packages (CoH, EMPIRE, TALYS, and ALICE) to cross sections measured using the stacked-target activation method. The experiment was performed using the Lawrence Berkeley National Laboratory 88-Inch Cyclotron with beams of 25 and 55 MeV protons on a stack of iron, copper, and titanium foils. Thirty-four excitation functions were measured from 4–55 MeV, including the first measurement of the independent cross sections for $$^{\mathrm{nat}}\hbox {Fe}$$ nat Fe (p,x)$$^{49,51}\hbox {Cr}$$ 49 , 51 Cr , $$^{51,{\mathrm{52m}},{\mathrm{52g}},56}\hbox {Mn}$$ 51 , 52 m , 52 g , 56 Mn , and $$^{{\mathrm{58m,58g}}}\hbox {Co}$$ 58 m , 58 g Co . All of the models, using default input parameters to assess their predictive capabilities, failed to reproduce the isomer-to-ground state ratio for reaction channels at compound and pre-compound energies, suggesting issues in modeling the deposition or distribution of angular momentum in these residual nuclei.

show abstract

Section: Supplementary Informationmentioning

confidence: 99%

Section: (): V-volmentioning

confidence: 99%

Section: Quantification Of Induced Activitiesmentioning

confidence: 99%

Section: S T a C Ki Dmentioning

confidence: 99%

See 2 more Smart Citations

Proton-induced reactions on Fe, Cu, and Ti from threshold to 55 MeV

et al. 2021

View full text Add to dashboard Cite

show abstract

“…17). Thus, 36 excited states up to the excitation energy of 5.943 MeV [106,108] have been considered for calculation of the DI pickup component of the α-emission spectrum at 14.8 MeV and 54 Fe(n, α) 51 Cr excitation function that are discussed below, at once with the similar ones for 56 Fe target nucleus.…”

Section: (N α) Reactionsmentioning

confidence: 99%

Validation of an optical potential for incident and emitted low-energy $$\alpha $$-particles in the $$A\sim 60$$ mass range

Avrigeanu

2021

Eur. Phys. J. A

View full text Add to dashboard Cite

A consistent set of statistical-model input parameters, validated by analysis of various independent data, makes possible the assessment of an $$\alpha $$ α -particle optical model potential [Phys. Rev. C 90, 044612 (2014)] also for nucleon-induced $$\alpha $$ α -emission within the $$A \sim 60$$ A ∼ 60 mass-number range. The advantage of recent data for low-lying states feeding is taken as well. Consideration of additional reaction channels leading to increase of the $$\alpha $$ α -emission beyond the statistical predictions has concerned the pickup direct interaction and Giant Quadrupole Resonance similar features.

show abstract

Towards resolving the gallium anomaly

Brdar

Gehrlein

2023

J. High Energ. Phys.

View full text Add to dashboard Cite

A series of experiments studying neutrinos from intense radioactive sources have reported a deficit in the measured event rate which, in combination, has reached a statistical significance of ∼ 5σ. In this paper, we explore avenues for explaining this anomaly, both within the Standard Model and beyond. First, we discuss possible biases in the predicted cross section for the detection reaction νe + 71Ga → e− + 71Ge, which could arise from mismeasurement of the inverse process, 71Ge decay, or from the presence of as yet unknown low-lying excited states of 71Ga. The latter would imply that not all 71Ge decays go to the ground state of 71Ga, so the extraction of the ground state-to-ground state matrix element relevant for neutrino capture on gallium would be incorrect. Second, we scrutinize the measurement of the source intensity in gallium experiments, and we point out that a ∼ 2% error in the branching ratios for 51Cr decay would be enough to explain the anomaly. Third, we investigate the calibration of the radiochemical germanium extraction efficiency as a possible origin of anomaly. Finally, we outline several new explanations beyond the Standard Model, including scenarios with sterile neutrinos coupled to fuzzy dark matter or to dark energy, as well as a model with decaying sterile neutrinos. We critically assess the viability of these scenarios, and others that have been proposed, in a summary table.

show abstract

Nuclear Data Sheets for A = 51

Cited by 28 publications

References 280 publications

Proton-induced reactions on Fe, Cu, and Ti from threshold to 55 MeV

Proton-induced reactions on Fe, Cu, and Ti from threshold to 55 MeV

Validation of an optical potential for incident and emitted low-energy $$\alpha $$-particles in the $$A\sim 60$$ mass range

Towards resolving the gallium anomaly

Contact Info

Product

Resources

About