An in-beam Ge(Li)-NaI(Tl) Compton suppression spectrometer

Beetz, R.; Posthumus, W.L.; Boer, F.W.N. de; Maarleveld, J.L.; Schaaf, A. van der; Konijn, J.

doi:10.1016/0029-554x(77)90432-3

Cited by 25 publications

(6 citation statements)

References 5 publications

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“…These lines were observed in all three time gates. The main background lines are listed elsewhere [15]. Additional calibration energies are available from the pionic X-ray transitions in the prompt spectra, where one can use the calculated electromagnetic energy values of the levels with n > 5.…”

Section: Experimental Techniquesmentioning

confidence: 99%

“…Two Ge(Li) detector systems were used, both viewing the target at angles perpendicular to the direction of the incident beam. On one side of the target, at a distance of 16cm, a semi-planar 15cm 3 Ge(Li) detector (efficiency 2% at 1.3MeV) was used, and on the opposite side, 32 cm from the target, a closed-end Ge(Li) detector (efficiency 10% at 1.3MeV), mounted in a Compton suppression device [15]. The NaI(T1) crystal (~5=25.4cm; L= 25.4cm) of this latter system was shielded by a cylinder of 5 cm of lead.…”

Section: Experimental Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

High spin states and neutron multiplicities after pion capture in181Ta and209Bi

Beetz¹,

Boer²,

Panman³

et al. 1978

Z Physik A

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The absorption of stopped n in 181Ta and 2~ has been investigated by studying prompt and delayed 7-ray spectra. Absolute cross-sections for the yield of isotopes per captured n-in (n-, xn) reactions, as well as the relative probability of populating nuclear states of different spins have been measured for the hafnium and lead isotopes, respectively. A spin as high as 20 has been observed in the production of 2~ The ground-state rotational bands of the hafnium isotopes are excited to spin values up to 16. Neutron multiplicities as large as 15 have been observed for both targets. A neutron multiplicity of -8 is most probable for both tantalum and bismuth targets. The strong interaction monopole energy shift e o and width F o for the 4f level are found to be e0(~81Ta)=540+100 eV; ~o(2~ 1790_+150 eV; Fo(181Ta)=225 +57 eV; F0(2~ = 1166 _+ 70 eV. The quadrupole moments, determined from the hyperfine splitting of the 4f pionic atom level, are Q=3.30+0.06b and Q=-0.50+0.08b for 181Ta and 2~ respectively.

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Section: Experimental Techniquesmentioning

confidence: 99%

Section: Experimental Techniquesmentioning

confidence: 99%

High spin states and neutron multiplicities after pion capture in181Ta and209Bi

Beetz¹,

Boer²,

Panman³

et al. 1978

Z Physik A

Self Cite

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“…Two different configurations of the shield have been reported [1][2][3][4][5]. The symmetncal Compton-suppression spectrometer [4] consists of a coaxial shield with a hollow core of the central detector.…”

Section: Introductionmentioning

confidence: 99%

“…Examples are the spectrometers of refs. [2] and [3] with solid angles of 7 and about 4 msr, respectively. These spectrometers are very suitable for singles measurements, such as those of a singles spectrum or of an angular distribution, where a large "),-ray flux compensates the small sohd angle.…”

Section: Introductionmentioning

confidence: 99%

A Compton-suppression spectrometer for γ-γ coincidence measurements: Large solid angle and excellent suppression

Aarts

Poel

Scherpenzeel

et al. 1980

Nuclear Instruments and Methods

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For 7-3' comcadence measurements a Compton-suppression spectrometer with a large sohd angle of 120 msr and excellent suppression has been designed. The dnnenslons of the NaI antlcomcldence shield have been opttmlzed by means of Monte Carlo calculations. The NaI shield has a length of 35 cm and a diameter of 30 cm. A 20% efficient HPGe crystal wth a dead layer of 0.22 mm and a hollow core ~s used as central detector For 6°Co, the average suppression of the Compton background between 100 and 1100 keV amounts to 11.8 with a photopeak loss of 5 8%. The areas of the 1173 and 1332 keV peaks taken together amount to 60% of the total number of registered counts for the suppressed spectrum and to 15% for the non-suppressed spectrum. The spectrometer has been tested in a 3"-3" comc~dence experiment w~th the reaction 24Mg + (45 MeV) ~ 60.

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“…Besides the increase of the crystal volume obtained from the improvements in the Ge crystal growing technique, a new technology based on Compton-suppressed HPGe detectors, in which anti-Compton detectors are surrounding the Ge ones, was developed ( Fig. 1.1) [4]. The objective was to improve the sensitivity by increasing the P/T ratio.…”

Section: Introduction To the High Resolution γ-Ray Spectroscopymentioning

confidence: 99%

Progress in the conceptual design of future gamma-tracking arrays with imaging capabilities. Lifetime measurement in neutron-rich nuclei in the region of the double magic Ni with the AGATA demonstrator

Monasterio¹

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An in-beam Ge(Li)-NaI(Tl) Compton suppression spectrometer

Cited by 25 publications

References 5 publications

High spin states and neutron multiplicities after pion capture in181Ta and209Bi

High spin states and neutron multiplicities after pion capture in181Ta and209Bi

A Compton-suppression spectrometer for γ-γ coincidence measurements: Large solid angle and excellent suppression

Progress in the conceptual design of future gamma-tracking arrays with imaging capabilities. Lifetime measurement in neutron-rich nuclei in the region of the double magic Ni with the AGATA demonstrator

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