Vacuum Ultraviolet Radiation and Jesse Effects in the Noble Gases

Hurst, G. S.; Stewart, T. E.; Parks, James E.

doi:10.1103/physreva.2.1717

Cited by 15 publications

(3 citation statements)

References 7 publications

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“…If we define W i (W ex ) as the average energy required to produce one electron-ion pair (one excited atom), it immediately follows that N ex /N i is equal to W i /W ex . The absolute ionization yield W i has been measured accurately for a number of particles: for x-rays, gammas and electrons a value of 22 eV with a spread of 1 eV has been measured [18][19][20][21], which is in good agreement with the 22-23 eV Monte Carlo calculated values for soft x-rays [22]. For alpha particles, consistent values of 20.9 ± 0.4 eV [13,24] and 21.9 eV [23] have been measured.…”

Section: Introductionsupporting

confidence: 71%

An improved measurement of electron-ion recombination in high-pressure xenon gas

Serra¹,

Sorel²,

Álvarez³

et al. 2015

J. Inst.

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We report on results obtained with the NEXT-DEMO prototype of the NEXT-100 high-pressure xenon gas time projection chamber (TPC), filled with pure xenon gas at 10 bar pressure and exposed to an alpha decay calibration source. Compared to our previous measurements with alpha particles, an upgraded detector and improved analysis techniques have been used. We measure event-by-event correlated fluctuations between ionization and scintillation due to electronion recombination in the gas, with correlation coefficients between −0.80 and −0.56 depending on the drift field conditions. By combining the two signals, we obtain a 2.8% FWHM energy resolution for 5.49 MeV alpha particles and a measurement of the optical gain of the electroluminescent TPC. The improved energy resolution also allows us to measure the specific activity of the radon in the gas due to natural impurities. Finally, we measure the average ratio of excited to ionized atoms produced in the xenon gas by alpha particles to be 0.561 ± 0.045, translating into an average energy to produce a primary scintillation photon of W ex = (39.2 ± 3.2) eV.

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Section: Introductionsupporting

confidence: 71%

An improved measurement of electron-ion recombination in high-pressure xenon gas

Serra¹,

Sorel²,

Álvarez³

et al. 2015

J. Inst.

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“…Typically, both values are taken as empirical parameters provided by experiments. The mean energy to form an electron-ion pair in high-pressure xenon, and when negligible recombination occurs, has been accurately measured to be about W i = 22 eV using X-rays, gamma rays and electrons [14][15][16][17]. The dependence of W i on electric field and gas density has also been systematically studied.…”

Section: Jinst 8 P05025mentioning

confidence: 99%

Ionization and scintillation response of high-pressure xenon gas to alpha particles

et al. 2013

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High-pressure xenon gas is an attractive detection medium for a variety of applications in fundamental and applied physics. In this paper we study the ionization and scintillation detection properties of xenon gas at 10 bar pressure. For this purpose, we use a source of alpha particles in the NEXT-DEMO time projection chamber, the large scale prototype of the NEXT-100 neutrinoless double beta decay experiment, in three different drift electric field configurations. We measure the ionization electron drift velocity and longitudinal diffusion, and compare our results to expectations based on available electron scattering cross sections on pure xenon. In addition, two types of measurements addressing the connection between the ionization and scintillation yields are performed. On the one hand we observe, for the first time in xenon gas, large event-by-event correlated fluctuations between the ionization and scintillation signals, similar to that already observed in liquid xenon. On the other hand, we study the field dependence of the average scintillation and ionization yields. Both types of measurements may shed light on the mechanism of electron-ion recombination in xenon gas for highly-ionizing particles. Finally, by comparing the response of alpha particles and electrons in NEXT-DEMO, we find no evidence for quenching of the primary scintillation light produced by alpha particles in the xenon gas.-2 -

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“…According to [3,4,5,6], the average energy expended per ion pair W ion g can be related to the ionization potential…”

Section: Noble Gas Scintillationmentioning

confidence: 99%

Detection of noble gas scintillation light with large area avalanche photodiodes (LAAPDs)

Chandrasekharan¹,

Messina²,

Rubbia³

2005

Nuclear Instruments and Methods in Physics Research Section A:

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Large area avalanche photodiodes (LAAPDs) were used for a series of systematic measurements of the scintillation light in Ar, Kr, and Xe gas. Absolute quantum efficiencies are derived. Values for Xe and Kr are consistent with those given by the manufacturer. For the first time we show that argon scintillation (128 nm) can be detected at a quantum efficiency above 40%. Low-pressure argon gas is shown to emit significant amounts of non-UV radiation. The average energy expenditure for the creation of non-UV photons in argon gas at this pressure is measured to be below 378 eV. r

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Vacuum Ultraviolet Radiation and Jesse Effects in the Noble Gases

Cited by 15 publications

References 7 publications

An improved measurement of electron-ion recombination in high-pressure xenon gas

An improved measurement of electron-ion recombination in high-pressure xenon gas

Ionization and scintillation response of high-pressure xenon gas to alpha particles

Detection of noble gas scintillation light with large area avalanche photodiodes (LAAPDs)

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