Gamma-ray detection with a 4π NaI spectrometer for material analysis

Mehrhoff, M.; Aliotta, M.; Baumvol, Israel Jacob Rabin; Becker, Hans‐Werner; Berheide, M.; Borucki, L.; Domke, J.; Gorris, F.; Kubsky, S.; Piel, N.; Roters, G.; Rolfs, C.; Schulte, W.H.

doi:10.1016/s0168-583x(97)00483-7

Cited by 15 publications

(4 citation statements)

References 26 publications

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“…The results of measurement and simulation agreed to better than 2%. Furthermore, the validity of the Monte Carlo code was verified for a different detector setup, i.e the 12 × 12" NaI detector at the Dynamitron-Tandem Laboratory of the Ruhr-Universität Bochum [42]. The present code delivered the same efficiency curve as a totally independent code based on GEANT 3.21.…”

Section: Monte Carlo Simulation and Efficiency Determinationmentioning

confidence: 72%

New experimental study of low-energy (p,γ) resonances in magnesium isotopes

Limata¹,

Strieder²,

Formicola³

et al. 2010

Phys. Rev. C

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Proton captures on Mg isotopes play an important role in the Mg-Al cycle active in stellar H-shell burning. In particular, the strengths of low-energy resonances with E<200 keV in 25Mg(p,γ)26Al determine the production of 26Al and a precise knowledge of these nuclear data is highly desirable. Absolute measurements at such low energies are often very difficult and hampered by γ-ray background as well as changing target stoichiometry during the measurements. The latter problem can be partly avoided using higher-energy resonances of the same reaction as a normalization reference. Hence the parameters of suitable resonances have to be studied with adequate precision. In the present work we report on new measurements of the resonance strengths ωγ of the E=214, 304, and 326 keV resonances in the reactions 24Mg(p,γ)25Al, 25Mg(p,γ)26Al, and 26Mg(p,γ)27Al, respectively. These studies were performed at the LUNA facility in the Gran Sasso underground laboratory using multiple experimental techniques and provided results with a higher accuracy than previously achieved

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Section: Monte Carlo Simulation and Efficiency Determinationmentioning

confidence: 72%

New experimental study of low-energy (p,γ) resonances in magnesium isotopes

Limata¹,

Strieder²,

Formicola³

et al. 2010

Phys. Rev. C

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“…The uncertainty of this procedure was estimated by varying the branching ratios in a reasonable range [10]: no significant influence was observed. The code was tested with calibrated sources [10] and, moreover, a perfect agreement with the results of [11] was obtained. A detailed discussion of these measurements will be presented in a forthcoming article [15].…”

Section: Measurements Of 25 Mg(p γ) 26 Al Strengthsmentioning

confidence: 78%

“…In the framework of LUNA, the resonances at E r = 304, 374, 418 and 745 keV have been investigated [10] at Ruhr-Universität-Bochum using the 4MV Dynamitron-Tandem accelerator, with an average proton beam current of 100 nA, and a 12 " x12 " 4π NaI summing crystal [11]. The Mg targets have been produced evaporating MgO powder isotopically enriched in 25 Mg (98%) on Ta backing.…”

Section: Measurements Of 25 Mg(p γ) 26 Al Strengthsmentioning

confidence: 99%

Measurement of²⁵Mg(p, γ)²⁶Al resonance strengths via gamma spectrometry

Formicola

Best

Imbriani

et al. 2007

J. Phys. G: Nucl. Part. Phys.

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Abstract. The COMPTEL instrument performed the first mapping of the 1.809 MeV photons in the Galaxy, triggering considerable interest in determing the sources of interstellar 26 Al. The predicted 26 Al is too low compared to the observation, for a better understanding more accurate rates for the 25 Mg(p, γ) 26 Al reaction are required. The 25 Mg(p, γ) 26 Al reaction has been investigated at the resonances at Er ‡= 745, 418, 374, 304 keV at Ruhr-Universität-Bochum using a Tandem accelerator and a 4π NaI detector. In addition the resonance at Er = 189 keV has been measured deep underground laboratory at Laboratori Nazionali del Gran Sasso, exploiting the strong suppression of cosmic background. This low resonance has been studied with the 400 kV LUNA accelerator and a HPGe detector. The preliminary results of the resonance strengths will be reported. The

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“…Radioactive sources of high precision exist and are readily available for energies less than 3 MeV. Calibration at higher energies is normally done through beam experiments using proton capture reactions on solid targets, as described in the works of Mehroff et al [69], Kolle et al [70], Elekes et al [71], Yoshimori et al [72], Drake et al [73], Waibel and Grosswendt [74], and Dryak et al [75]. The ISAC accelerator was not designed to deliver protons.…”

Section: Efficiency M Easurem Ent Techniquementioning

confidence: 99%

Efficiency calibration measurement and GEANT simulation of the DRAGON BGO gamma ray array at TRIUMF.

Gigliotti¹

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Gamma-ray detection with a 4π NaI spectrometer for material analysis

Cited by 15 publications

References 26 publications

New experimental study of low-energy (p,γ) resonances in magnesium isotopes

New experimental study of low-energy (p,γ) resonances in magnesium isotopes

Measurement of²⁵Mg(p, γ)²⁶Al resonance strengths via gamma spectrometry

Efficiency calibration measurement and GEANT simulation of the DRAGON BGO gamma ray array at TRIUMF.

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Gamma-ray detection with a 4π NaI spectrometer for material analysis

Cited by 15 publications

References 26 publications

New experimental study of low-energy (p,γ) resonances in magnesium isotopes

New experimental study of low-energy (p,γ) resonances in magnesium isotopes

Measurement of25Mg(p, γ)26Al resonance strengths via gamma spectrometry

Efficiency calibration measurement and GEANT simulation of the DRAGON BGO gamma ray array at TRIUMF.

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Measurement of²⁵Mg(p, γ)²⁶Al resonance strengths via gamma spectrometry