2022-05-27
17:44 |
Direct evidence of Be as an amphoteric dopant in GaN
/ Wahl, U. ; Correia, J. G. ; Costa, A. R. G. ; Lima, T. A. L. ; Moens, J. ; Kappers, M. J. ; da Silva, M. R. ; Pereira, L. M. C. ; Vantomme, A.
/IS634 Collaboration
The interest in Be as an impurity in GaN stems from the challenge to understand why GaN can be doped p type with Mg, while this does not work for Be. While theory has actually predicted an acceptor level for Be that is shallower than Mg, it was also argued that Be is not a suitable acceptor because its am-photeric nature, i.e. [...]
- Published in : Physical Review B105 (2022) 184112
Postprint from Phys. Rev. B 105 (2022) 184112: PDF; Supplemental Material from Phys. Rev. B 105 (2022) 184114: PDF;
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2022-05-06
06:24 |
Detaljnije - Slični zapisi
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2022-04-06
06:08 |
Decay modes of the $9/2^-$ isomeric state in $^{183}$Tl
/ Venhart, M (Bratislava, Inst. Phys.) ; Andreyev, A N (JAERI, Tokai ; York U., England) ; Cubiss, J G (York U., England) ; Wood, J L (Georgia Tech., Atlanta) ; Barzakh, A E (St. Petersburg, INP) ; Van Beveren, C (Leuven U.) ; Cocolios, T E (Leuven U.) ; de Groote, R P (Leuven U.) ; Fedorov, D V (St. Petersburg, INP) ; Fedosseev, V N (CERN) et al.
The internal transition decay and α decay of the $T_{1/2} = 53.3$ ms, $9/2^-$ isomeric state in the neutron-deficient isotope, $^{183}$Tl, have been studied using the Resonance Ionization Laser Ion Source and the Windmill detection setup at the ISOLDE facility at CERN. Clean samples of $^{183}$Tl were produced by selective laser ionization and subsequent mass separation. [...]
2022 - 9 p.
- Published in : Phys. Rev. C 105 (2022) 034338
Fulltext: PDF;
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2022-02-15
06:02 |
Detaljnije - Slični zapisi
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2022-01-13
06:16 |
Producing gold at ISOLDE-CERN
/ Barzakh, A E (St. Petersburg, INP) ; Andreyev, A N (York U., England ; JAERI, Tokai) ; Atanasov, D (Heidelberg, Max Planck Inst.) ; Cubiss, J G (York U., England) ; Harding, R D (York U., England ; CERN) ; Al Monthery, M (York U., England) ; Althubiti, N A (Manchester U. ; Al Jouf U.) ; Andel, B (Comenius U. ; Leuven U.) ; Antalic, S (Comenius U.) ; Ballof, J (CERN ; Mainz U., Inst. Kernchem.) et al.
The yield of 18 ion beams of radioactive gold nuclei produced in the thick uranium target at ISOLDE (CERN) by 1.4-GeV protons was measured. The production-efficiency dependence on the half-life (efficiency curve) was derived using the in-target production calculations by the FLUKA-CERN code. [...]
2022 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 513 (2022) 26-32
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2022-01-11
06:26 |
A miniaturized low-power SiPM-based β detector for the ISOLDE Fast Tapestation
/ Neacşu, Cătălin (Bucharest, Polytechnic Inst. ; Bucharest, IFIN-HH) ; Lică, Răzvan (CERN ; Bucharest, IFIN-HH) ; Pascovici, George (Bucharest, IFIN-HH) ; Mihai, Constantin (Bucharest, IFIN-HH) ; Rothe, Sebastian (CERN)
We report on the development of a miniaturized Silicon Photomultiplier (SiPM)-based β detector aimed as an upgrade of the newly commissioned Fast Tapestation at CERN-ISOLDE, dedicated for online radioisotope production measurements. The detector consists of a thin 3 mm plastic scintillator coupled to a custom 3 × 3 array of 6×6mm2 sized SiPM cells in a signal-driven multiplexer configuration. [...]
2022
- Published in : Nucl. Instrum. Methods Phys. Res., A 1026 (2022) 166213
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2021-11-18
04:59 |
Detaljnije - Slični zapisi
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2021-11-16
06:02 |
Large Shape Staggering in Neutron-Deficient Bi Isotopes
/ Barzakh, A (St. Petersburg, INP) ; Andreyev, A N (JAEA, Ibaraki ; York U., England) ; Raison, C (York U., England) ; Cubiss, J G (York U., England) ; Van Duppen, P (Leuven U.) ; Péru, S (CEA DAM) ; Hilaire, S (CEA DAM) ; Goriely, S (Brussels U., IAA) ; Andel, B (Comenius U.) ; Antalic, S (Comenius U.) et al.
The changes in the mean-square charge radius (relative to $^{209}$Bi), magnetic dipole, and electric quadrupole moments of $^{187,188,189,191}$Bi were measured using the in-source resonance-ionization spectroscopy technique at ISOLDE (CERN). A large staggering in radii was found in $^{187,188,189}$Big, manifested by a sharp radius increase for the ground state of $^{188}$Bi relative to the neighboring $^{187,189}$Big. [...]
2021 - 7 p.
- Published in : Phys. Rev. Lett. 127 (2021) 192501
Fulltext: PDF;
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2021-11-16
06:02 |
Evolution of single-particle structure near the $N=20$ island of inversion
/ MacGregor, P T (Manchester U.) ; Sharp, D K (Manchester U.) ; Freeman, S J (Manchester U.) ; Hoffman, C R (Argonne, PHY) ; Kay, B P (Argonne, PHY) ; Tang, T L (Argonne, PHY) ; Gaffney, L P (Liverpool U. ; CERN) ; Baader, E F (CERN) ; Borge, M J G (Madrid, Inst. Estructura Materia) ; Butler, P A (Liverpool U.) et al.
The single-particle properties of $^{29}$Mg have been investigated via a measurement of the $^{28}$Mg(d,p) 29Mg reaction, in inverse kinematics, using the ISOLDE Solenoidal Spectrometer. The negative-parity intruder states from the f p shell have been identified and used to benchmark modern shell-model calculations. [...]
2021 - 7 p.
- Published in : Phys. Rev. C 104 (2021) L051301
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2021-11-09
09:05 |
New $\beta$-decaying state in $^{214}$Bi
/ IDS Collaboration
A new $\beta$-decaying state in $^{214}$Bi has been identified at the ISOLDE Decay Station at the CERN-ISOLDE facility. A preferred $I^{\pi} = (8^-)$ assignment was suggested for this state based on the β-decay feeding pattern to levels in $^{214}$Po and shell-model calculations. [...]
2021 - 13 p.
- Published in : Phys. Rev. C 104 (2021) 054301
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