More Like this

1. Spectroscopic study of the 4 f 7 6 s 2 8 S 7/2∘−4 f 7 ( 8 S ∘ )6 s 6 p ( 1 P ∘ ) 8 P 9/2 transition in neutral europium-151 and europium-153: absolute frequency and hyperfine structure

   https://doi.org/10.1364/JOSAB.467968  

   Herd, M. T. ; Maruko, C. ; Herzog, M. M. ; Brand, A. ; Cannon, G. ; Duah, B. ; Hollin, N. ; Karani, T. ; Wallace, A. ; Whitmore, M. ; et al ( September 2022 , Journal of the Optical Society of America B)

   We report on spectroscopic measurements on the$4f^{7}6s^2{}^8{S}_{7/2}^{\circ <\#comment/>}\to <\#comment/>4f^7{(}^8{S}^{\circ <\#comment/>})6s6p{(}^1{P}^{\circ <\#comment/>}){}^8{P}_{9/2}$transition in neutral europium-151 and europium-153 at 459.4 nm. The center of gravity frequencies for the 151 and 153 isotopes, reported for the first time in this paper, to our knowledge, were found to be 652,389,757.16(34) MHz and 652,386,593.2(5) MHz, respectively. The hyperfine coefficients for the$6s6p{(}^1{P}^{\circ <\#comment/>}){}^8{P}_{9/2}$state were found to be$\mathrm{A}(151)=-<\#comment/>228.84(2)\mathrm{M}\mathrm{H}\mathrm{z}$,$\mathrm{B}(151)=226.9(5)\mathrm{M}\mathrm{H}\mathrm{z}$and$\mathrm{A}(153)=-<\#comment/>101.87(6)\mathrm{M}\mathrm{H}\mathrm{z}$,$\mathrm{B}(153)=575.4(1.5)\mathrm{M}\mathrm{H}\mathrm{z}$, which all agree with previously published results except for A(153), which shows a small discrepancy. The isotope shift is found to be 3163.8(6) MHz, which also has a discrepancy with previously published results.

    

   more » « less
2. As-P vs. P-P Insertion in AsP 3 : Kinetic Control of the Formation of [AsP 3 NO] +: As-P vs. P-P Insertion in AsP 3 : Kinetic Control of the Formation of [AsP 3 NO] +

   https://doi.org/10.1002/ejic.201900267  

   Engesser, Tobias A. ; Transue, Wesley J. ; Weis, Philippe ; Cummins, Christopher C. ; Krossing, Ingo ( May 2019 , European Journal of Inorganic Chemistry)
3. Spectroscopic study of the 4f 7 6s 2 8 S 7/2∘ – 4f 7 ( 8 S ° ) 6s6p( 1 P ° ) 8 P 5/2,7/2 transitions in neutral europium-151 and europium-153: absolute frequency and hyperfine structure

   https://doi.org/10.1364/JOSAB.521181  

   Maruko, C. ; Çölmek, N. N. ; Herd, M. T. ; Ahrendsen, K. J. ; Cabrales, B. ; Cannon, G. ; Davis, E. ; Guo, X. Y. ; Karani, T. ; Wallace, A. ; et al ( April 2024 , Journal of the Optical Society of America B)

   We report on spectroscopic measurements on the 4f⁷6s²⁸S_7/2^∘−4f⁷(⁸S^∘)6s6p(¹P^∘)⁸P_5/2,7/2transitions at 466.32 nm and 462.85 nm, respectively, in neutral europium-151 and europium-153. The center of gravity frequencies for the 151 and 153 isotopes for both transitions are reported for the first time using saturated absorption spectroscopy. For the 6s6p(¹P^∘)⁸P_5/2state, the center of gravity frequencies were found to be 642,894,493.3(4) MHz and 642,891,693.3(9) MHz for the 151 and 153 isotopes, respectively. The hyperfine constants for the upper state were found to beA(151)=−157.01(3)MHz,B(151)=74.5(4)MHz andA(153)=−69.43(14)MHz,B(153)=191.0(26)MHz. These hyperfine values are all consistent with previously published results except forB(151) that has a small discrepancy. The isotope shift was found to be 2799.54(20) MHz, a small discrepancy with previously published results. For the 6s6p(¹P^∘)⁸P_7/2state, the center of gravity frequencies were found to be 647,708,930.6(6) MHz and 647,705,958.4(26) MHz for the 151 and 153 isotopes, respectively. The hyperfine constants for the upper state were found to beA(151)=−218.66(4)MHz,B(151)=−293.4(8)MHz andA(153)=−97.15(13)MHz,B(153)=−750(3)MHz. These values are all consistent with previously published results except forA(151) that has a small discrepancy. The isotope shift was found to be 2972.8(5) MHz, a small discrepancy with previously measured results.

    

   more » « less
4. Study of the 44 Ti(α, p) 47 V reaction rate using high-precision 50 Cr(p, t) 48 Cr measurements

   https://doi.org/10.1088/1742-6596/2586/1/012106  

   Binda, S D ; Adsley, P ; Long, A M ; Berg, G ; Brümmer, J W ; Couder, M ; Görres, J ; Kamimota, M ; Khumalo, N ; Köhne, M ; et al ( September 2023 , Journal of Physics: Conference Series)

   The abundance and distribution of⁴⁴Ti tells us about the nature of the core-collapse supernovae explosions. There is a need to understand the nuclear reaction network creating and destroying⁴⁴Ti in order to use it as a probe for the explosive mechanism. The⁴⁴Ti(α, p)⁴⁷V reaction is a very important reaction and it controls the destruction of⁴⁴Ti. Difficulties with direct measurements have led to an attempt to study this reaction indirectly. Here, the first step of the indirect study which is the identification of levels of the compound nucleus⁴⁸Cr is presented. A 100-MeV proton beam was incident on a⁵⁰Cr target. States in⁴⁸Cr were populated in the⁵⁰Cr(p, t)⁴⁸Cr reaction. The tritons were momentum-analysed in the K600 Q2D magnetic spectrometer at iThemba LABS.

    

   more » « less
5. Shell-model studies of the astrophysical rp-process reactions 34 S(p,γ) 35 Cl and 34g,m Cl(p,γ) 35 Ar

   https://doi.org/10.1088/1742-6596/1643/1/012064  

   Richter, W. A. ; Brown, B. Alex ; Longland, R. ; Wrede, C. ; Fry, C. ; Denisenkov, P. ; Herwig, F. ; Kurtulgil, D. ; Pignatari, M. ; Reifarth, R. ( December 2020 , Journal of Physics: Conference Series)

   null (Ed.)