B. S. Nara Singh
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View article: Study of the \(B_{4/2}\) Anomaly in the Yrast States of \(^{167}\)Os
Study of the \(B_{4/2}\) Anomaly in the Yrast States of \(^{167}\)Os Open
In recent years, several cases of nuclei presenting the so-called “\(B_{4/2}\) anomaly” have been observed in the neutron-deficient region close to \(Z=50\) and \(Z=82\). In the last region, the osmium isotopic chain is of particular inter…
View article: Anomalous <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>B</mml:mi><mml:mrow><mml:mn>4</mml:mn><mml:mo>/</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math> ratio in the yrast band of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Os</mml:mi><mml:mprescripts/><mml:none/><mml:mn>167</mml:mn></mml:mmultiscripts></mml:math>
Anomalous ratio in the yrast band of Open
Several instances of anomalously low values of the B(E2;41+→21+)B(E2;21+→0gs+) ratio (B4/2)<1 have previously been observed in several nuclei among the highly neutron deficient W-Os-Pt isotopes with even numbers of neutrons and protons. Th…
View article: First Identification of Excited States in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Zr</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>78</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> and Implications for Isospin Nonconserving Forces in Nuclei
First Identification of Excited States in and Implications for Isospin Nonconserving Forces in Nuclei Open
At a fundamental level, the interactions between protons and protons, protons and neutrons, and neutrons and neutrons are not identical. Such isospin nonconserving interactions emerge when comparing the excitation energy of analog states i…
View article: In-beam <i>γ</i> ray spectroscopy of <sup>94</sup>Ag
In-beam <i>γ</i> ray spectroscopy of <sup>94</sup>Ag Open
The fusion evaporation reaction 40 Ca( 58 Ni,p3n) 94 Ag has been used to study the odd-odd N=Z nucleus 94 Ag at JYFL-ACCLAB using the MARA recoil separator and the JUROGAM 3 HPGe detector array. The recoil- β -tagging technique has allowed…
View article: The shape of the T = +1 nucleus 94Pd and the role of proton-neutron interactions on the structure of its excited states
The shape of the T = +1 nucleus 94Pd and the role of proton-neutron interactions on the structure of its excited states Open
View article: Broken seniority symmetry in the semimagic proton mid-shell nucleus <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Rh</mml:mi><mml:mprescripts/><mml:none/><mml:mn>95</mml:mn></mml:mmultiscripts></mml:math>
Broken seniority symmetry in the semimagic proton mid-shell nucleus Open
Lifetime measurements of low-lying excited states in the semimagic (N=50) nucleus Rh
View article: Lifetime measurement of the yrast 2$$^+$$ state in $$^{118}$$Te
Lifetime measurement of the yrast 2$$^+$$ state in $$^{118}$$Te Open
The electromagnetic transition probabilities of the yrast $$2^+$$ states in the midshell Te isotopes, two protons above the closed shell at Sn, are of great importance for the understanding of nuclear collectivity in these isotopes and…
View article: Photo-response of the $$N=Z$$ nucleus $$^{24}$$Mg
Photo-response of the $$N=Z$$ nucleus $$^{24}$$Mg Open
View article: An innovative Superconducting Recoil Separator for HIE-ISOLDE
An innovative Superconducting Recoil Separator for HIE-ISOLDE Open
View article: In-beam $$\gamma $$-ray spectroscopy of $$^{94}$$Ag
In-beam $$\gamma $$-ray spectroscopy of $$^{94}$$Ag Open
View article: Ca40(α,γ)Ti44 reaction in the energy regime of supernova nucleosynthesis
Ca40(α,γ)Ti44 reaction in the energy regime of supernova nucleosynthesis Open
The Ti44(t1/2=59yr) nuclide, an important signature of supernova nucleosynthesis, has recently been observed as live radioactivity by γ-ray astronomy from the Cas A remnant. We investigate in the laboratory the major Ti44 production reacti…
View article: Decay spectroscopy of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Os</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>171</mml:mn><mml:mo>,</mml:mo><mml:mn>172</mml:mn></mml:mrow></mml:mmultiscripts></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ir</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>171</mml:mn><mml:mo>,</mml:mo><mml:mn>172</mml:mn><mml:mo>,</mml:mo><mml:mn>174</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>
Decay spectroscopy of and Open
We report on a study of the α-decay fine structure and the associated Eα-Eγ correlations in the decays of Os171,172 and Ir171,172,174. In total, 13 new α-decay energy lines have been resolved, and three new γ-ray transitions have been obse…
View article: Fast-timing Measurement in \(^{96}\)Pd: Improved Accuracy for the Lifetime of the \(4_1^{+}\) State
Fast-timing Measurement in \(^{96}\)Pd: Improved Accuracy for the Lifetime of the \(4_1^{+}\) State Open
Direct lifetime measurements via \(\gamma \)–\(\gamma \) coincidences using the FATIMA fast-timing LaBr\(_{3}\)(Ce) array were performed for the excited states below previously reported isomers. In the \(N=50\) semi-magic \(^{96}\)Pd nucle…
View article: Decay studies in the <i>A</i> ∼ 225 Po-Fr region from the DESPEC campaign at GSI in 2021
Decay studies in the <i>A</i> ∼ 225 Po-Fr region from the DESPEC campaign at GSI in 2021 Open
The HISPEC-DESPEC collaboration aims at investigating the structure of exotic nuclei formed in fragmentation reactions with decay spectroscopy measurements, as part of the FAIR Phase-0 campaign at GSI. This paper reports on first results o…
View article: Nature of seniority symmetry breaking in the semimagic nucleus <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ru</mml:mi><mml:mprescripts/><mml:none/><mml:mn>94</mml:mn></mml:mmultiscripts></mml:math>
Nature of seniority symmetry breaking in the semimagic nucleus Open
Direct lifetime measurements via gamma -gamma coincidences using a fast timing detector array consisting of LaBr3(Ce) scintillators has been applied to determine the lifetime of low-lying states in the semimagic (N = 50) nucleus Ru-94. The…
View article: Single-particle states and parity doublets in odd-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>Z</mml:mi></mml:math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ac</mml:mi><mml:mprescripts/><mml:none/><mml:mn>221</mml:mn></mml:mmultiscripts></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Pa</mml:mi><mml:mprescripts/><mml:none/><mml:mn>225</mml:mn></mml:mmultiscripts></mml:math> from <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>α</mml:mi></mml:math>-decay spectroscopy
Single-particle states and parity doublets in odd- and from -decay spectroscopy Open
Low-lying states in the odd-Z isotopes Ac13289221 and Pa13491225 have been studied using α-particle and αγ-coincidence spectroscopy in the Pa225→Ac221→Fr217 decay chain. Ground-state spin and parity assignments of Iπ = 5/2- are proposed fo…
View article: Coulomb excitation of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Rn</mml:mi><mml:mprescripts/><mml:none/><mml:mn>222</mml:mn></mml:mmultiscripts></mml:math>
Coulomb excitation of Open
The nature of quadrupole and octupole collectivity in 222Rn was investigated by determining the electricquadrupole (E2) and octupole (E3) matrix elements using subbarrier, multistep Coulomb excitation. The radioactive 222Rn beam, accelerat…
View article: Identification of excited states in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Te</mml:mi><mml:mn>55</mml:mn><mml:none/><mml:mprescripts/><mml:mn>52</mml:mn><mml:mn>107</mml:mn></mml:mmultiscripts></mml:math>
Identification of excited states in Open
Excited states in the extremely neutron-deficient nucleus 107Te have been identified from two separate experiments using the recoil-decay tagging technique. Two connected structures were observed on the basis of γγ-coincidence relations an…
View article: Erratum: Probing isospin symmetry in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mo>(</mml:mo><mml:mmultiscripts><mml:mi>Fe</mml:mi><mml:mprescripts/><mml:none/><mml:mn>50</mml:mn></mml:mmultiscripts><mml:mo>,</mml:mo><mml:mspace width="0.28em"/><mml:mmultiscripts><mml:mi>Mn</mml:mi><mml:mprescripts/><mml:none/><mml:mn>50</mml:mn></mml:mmultiscripts><mml:mo>,</mml:mo><mml:mspace width="0.28em"/><mml:mmultiscripts><mml:mi>Cr</mml:mi><mml:mprescripts/><mml:none/><mml:mn>50</mml:mn></mml:mmultiscripts><mml:mo>)</mml:mo></mml:mrow></mml:math> isobaric triplet via electromagnetic transition rates [Phys. Rev. C <b>99</b>, 044317 (2019)]
Erratum: Probing isospin symmetry in the isobaric triplet via electromagnetic transition rates [Phys. Rev. C <b>99</b>, 044317 (2019)] Open
Received 11 June 2021DOI:https://doi.org/10.1103/PhysRevC.104.029901©2021 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasElectromagnetic transitionsLifetimes & widthsNuclear structure & decaysProperties39 ≤ A ≤ 58Nu…
View article: Lifetime measurements of excited states in 169,171,173Os: Persistence of anomalous B(E2) ratios in transitional rare earth nuclei in the presence of a decoupled i13/2 valence neutron
Lifetime measurements of excited states in 169,171,173Os: Persistence of anomalous B(E2) ratios in transitional rare earth nuclei in the presence of a decoupled i13/2 valence neutron Open
Lifetimes of low-lying excited states in the νi13/2+ bands of the neutron-deficient osmium isotopes 169,171,173Os have been measured for the first time using the recoil-distance Doppler shift and recoil-isomer tagging techniques. An unusuall…
View article: Lifetime measurements of yrast states in $$^{\mathbf {178}}$$Pt using the charge plunger method with a recoil separator
Lifetime measurements of yrast states in $$^{\mathbf {178}}$$Pt using the charge plunger method with a recoil separator Open
View article: DESPEC Phase-0 campaign at GSI
DESPEC Phase-0 campaign at GSI Open
This paper reports preliminary results of the DESPEC campaign at GSI, focused on the study of neutron-deficient nuclei approaching 100Sn. The results presented show the isomeric decays of excited states with Iπ…
View article: Experimental study of lifetimes of excited states in the K<sup>π</sup> = 0<sup>−</sup> octupole band and γ-vibrational band in <sup>228</sup>Th
Experimental study of lifetimes of excited states in the K<sup>π</sup> = 0<sup>−</sup> octupole band and γ-vibrational band in <sup>228</sup>Th Open
Lifetimes of excited states in the K π = 0 − octupole band and γ -vibrational of 228 Th have been measured using the fast timing setup at the University of the West of Scotland (UWS). The setup consists of two cerium doped LaBr 3 fast scin…
View article: Lifetime measurements of excited states in neutron-rich <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ti</mml:mi><mml:mprescripts/><mml:none/><mml:mn>53</mml:mn></mml:mmultiscripts></mml:math>: Benchmarking effective shell-model interactions
Lifetime measurements of excited states in neutron-rich : Benchmarking effective shell-model interactions Open
Level lifetimes of the yrast (5/2-) to 13/2- states in the neutron-rich nucleus Ti53, produced in a multinucleon-transfer reaction, have been measured for the first time. The recoil distance Doppler-shift method was employed and lifetimes …
View article: Publisher Correction: The observation of vibrating pear-shapes in radon nuclei
Publisher Correction: The observation of vibrating pear-shapes in radon nuclei Open
View article: A charge plunger device to measure the lifetimes of excited nuclear states where transitions are dominated by internal conversion
A charge plunger device to measure the lifetimes of excited nuclear states where transitions are dominated by internal conversion Open
View article: High-Statistics Sub-Barrier Coulomb Excitation of <sup>106,108,110</sup>Sn
High-Statistics Sub-Barrier Coulomb Excitation of <sup>106,108,110</sup>Sn Open
A Coulomb excitation campaign on $^{106,108,110}$Sn at 4.4–4.5 MeV/u was launched at the HIE-ISOLDE facility at CERN. Larger excitation cross sections and γ-ray statistics were achieved compared to previous experiments at ∼2.8 MeV/u. More …
View article: Addendum: The observation of vibrating pear-shapes in radon nuclei
Addendum: The observation of vibrating pear-shapes in radon nuclei Open
View article: Direct measurement of the intrinsic electric dipole moment in pear-shaped thorium-228
Direct measurement of the intrinsic electric dipole moment in pear-shaped thorium-228 Open
Atomic nuclei with certain combinations of proton and neutron numbers can adopt reflection-asymmetric or octupole-deformed shapes at low excitation energy. These nuclei present a promising avenue in the search for a permanent atomic electr…
View article: Benchmarking the PreSPEC@GSI experiment for Coulex-multipolarimetry on the $$\pi (p_{3/2})\rightarrow \pi (p_{1/2})$$ spin-flip transition in $$^{85}\hbox {Br}$$
Benchmarking the PreSPEC@GSI experiment for Coulex-multipolarimetry on the $$\pi (p_{3/2})\rightarrow \pi (p_{1/2})$$ spin-flip transition in $$^{85}\hbox {Br}$$ Open