Delayed Pion Spectroscopy of Hypernuclei

Margaryan, A.; Achenbach, P.; Ajvazyan, R.; Annand, J. R. M.; Garibaldi, F.; Grigoryan, N.; Fujii, Y.; Hashimoto, Osamu; Majling, L.; Nakamura, S. N.; Pochodzalla, J.; Reinhold, J.; Tang, L.; Tsukuda, Kyo; Vardanyan, H.; Zhamkochyan, S.

doi:10.1088/1742-6596/496/1/012006

Cited by 3 publications

(5 citation statements)

References 12 publications

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“…The RFPMT based Cherenkov detectors, with ∼10 ps time resolution, allow the realization of a new type nuclear spectroscopy, "delayed-pion" spectroscopy [22] at modern electron accelerators. This will increase the decay pion statistics by about two orders of magnitude compared to experiments proposed at Jefferson Lab or carried out at MAMI.…”

Section: Rft and Rfpmt: Applications In Nuclear Physicsmentioning

confidence: 99%

Advanced picosecond precision Radio Frequency Timer

Zhamkochyan,

Kakoyan,

Abrahamyan

et al. 2024

J. Inst.

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A new type of radio frequency (RF) timing technique is presented. It is based on a helical deflector, which performs circular or elliptical sweeps of photo- or secondary electrons, accelerated to keV energies, by means of RF fields in the 500–1000 MHz range. By converting a time distribution of the electrons to a hit position distribution on a circle or ellipse, this device achieves extremely precise timing, similar to streak cameras. Detection of the scanned electrons, using a position sensitive detector based on microchannel plates and a delay line anode, resulted in a timing resolution of 10 ps, which can be potentially improved to 1 ps. RF-Timer-based single photon and heavy ion detectors have potential applications in different fields of science and industry, which include high energy nuclear physics and imaging technologies. This technique could play a crucial role in developing of sub 10 ps Time-of-Flight Positron Emission Tomography.

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Section: Rft and Rfpmt: Applications In Nuclear Physicsmentioning

confidence: 99%

Advanced picosecond precision Radio Frequency Timer

Zhamkochyan,

Kakoyan,

Abrahamyan

et al. 2024

J. Inst.

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“…This experiment was carried out by the A1 Collaboration at the spectrometer facility at the Mainz Microtron MAMI [14]. A 1.508 GeV electron beam with a current of 20 µA was incident on a 125 µm thick 9 target foil angled at 54 degrees with respect to the beam direction.…”

Section: The Hyperfragment Electroproduction Experiments At Mami-cmentioning

confidence: 99%

“…The useful event rate can be increased by several orders of magnitude by using the concept of "delayed-− " spectroscopy [14]. and MAMI has beam buckets of ~ps duration separated at ~ns intervals.…”

Section: Decay Pion Spectroscopy Of the λ-Hypernuclei: A New Approachmentioning

confidence: 99%

“…The useful event rate can be increased by several orders of magnitude by using the concept of "delayed-𝜋 − " spectroscopy [14]. The experimental setup in this case consists only of the decay pion spectrometer, 𝐻𝜋𝑆, i.e.…”

Section: Decay Pion Spectroscopy Of the λ-Hypernuclei: A New Approachmentioning

confidence: 99%

“…In addition by measuring lifetimes of the low lying hypernuclear states and by applying the "tagged-weak 𝜋 − method" [16], the electromagnetic excitation rates of such states with lifetimes down to ≅ 10 −11 s could be investigated, which is another avenue for hypernuclear studies. The experimental information on these characteristics of the ΛN interaction is essential to test and improve baryon-baryon interaction models, which are needed for a comprehensive understanding of the strong interaction between hyperons and high density nuclear matter [14].…”

Section: Decay Pion Spectroscopy Of the λ-Hypernuclei: A New Approachmentioning

confidence: 99%

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Decay pion spectroscopy: A new approach

Margaryan

Ajvazyan

Grigoryan

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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We propose a new experiment for decay pion spectroscopy of light hypernuclei at electronand proton-beam facilities, using the recoil distance technique for separation of produced hypernuclei and a magnetic spectrometer for precise measurement of the decay pion momentum.Low-pressure MWPCs are advocated for low-energy recoil detection as they provide position and time information and are highly insensitive to gamma-ray and electron background. The position and timing characteristics of such a recoil detector were studied using ~5 MeV αparticles. By using the present proposed approach the rate of the detected hypernuclei can be increased by one-to-two orders of magnitude compared to a recent experiment carried out at the MAMI electron accelerator in Mainz. The possibility of realizing a high luminosity decay pion spectroscopy experiment with proton beams is also discussed.

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