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Your search keyword '"Saito, T. R."' showing total 25 results
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25 results on '"Saito, T. R."'

1. Hypernuclear event detection in the nuclear emulsion with Monte Carlo simulation and machine learning

Author

Kasagi, A., Dou, W., Drozd, V., Ekawa, H., Escrig, S., Gao, Y., He, Y., Liu, E., Muneem, A., Nakagawa, M., Nakazawa, K., Rappold, C., Saito, N., Saito, T. R., Sugimoto, S., Taki, M., Tanaka, Y. K., Yanai, A., Yoshida, J., Yoshimoto, M., and Wang, H.

Subjects
Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

This study developed a novel method for detecting hypernuclear events recorded in nuclear emulsion sheets using machine learning techniques. The artificial neural network-based object detection model was trained on surrogate images created through Monte Carlo simulations and image-style transformations using generative adversarial networks. The performance of the proposed model was evaluated using $\alpha$-decay events obtained from the J-PARC E07 emulsion data. The model achieved approximately twice the detection efficiency of conventional image processing and reduced the time spent on manual visual inspection by approximately 1/17. The established method was successfully applied to the detection of hypernuclear events. This approach is a state-of-the-art tool for discovering rare events recorded in nuclear emulsion sheets without any real data for training., Comment: 32 pages, 13 figures

Published
2023
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2. CNN-based event classification for alpha-decay events in nuclear emulsion

Author

Yoshida, J., Ekawa, H., Kasagi, A., Nakagawa, M., Nakazawa, K., Saito, N., Saito, T. R., Taki, M., and Yoshimoto, M.

Subjects
Nuclear Experiment
Abstract

We developed an efficient classifier that sorts alpha-decay events from various vertex-like objects in nuclear emulsion using a convolutional neural network (CNN). Alpha-decay events in the emulsion are standard calibration sources for the relation between the track length and kinetic energy in each emulsion sheet. We trained the CNN using 15,885 images of vertex-like objects including 906 alpha-decay events and tested it using a dataset of 46,948 images including 255 alpha-decay events. By tuning the hyperparameters of the CNN, the trained models achieved an Average Precision Score of 0.740 +/- 0.009 for the test dataset. For the model obtained, a discrimination threshold of the classification can be arbitrarily adjusted according to the balance between the precision and recall. The precision and recall of the classification using previous method without a CNN were 0.081 +/- 0.006 and 0.788 +/- 0.056, respectively, for the same dataset. By contrast, the developed classifier obtained a precision of 0.547 +/- 0.025 when a similar recall value of 0.788 was set. The developed CNN method reduced the human load for further visual inspection after the classification by approximately 1/7 compared to the estimated load of the former method without a CNN.

Published
2020
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3. Excitation of baryonic resonances in stable medium-mass nuclei of Sn

Author

Rodriguez-Sanchez, J L, Benlliure, J, Haettner, E, Scheidenberger, C, Vargas, J, Ayyad, Y, Alvarez-Pol, H, Atkinson, J, Aumann, T, Beceiro-Novo, S, Boretzky, K, Caamaño, M, Casarejos, E, Cortina-Gil, D, Fernandez, P Diaz, Estrade, A, Geissel, H, Itahashi, K, Kelic-Heil, A, Lenske, H, Litvinov, Yu A, Paradela, C, Perez-Loureiro, D, Pietri, S, Prochazka, A, Saito, T R, Takechi, M, Tanaka, Y K, Vidaña, I, Weick, H, Winfield, J S, and collaboration, the Super-FRS experiment

Subjects
Nuclear Experiment
Abstract

Isobaric charge-exchange reactions induced by beams of 112Sn have been investigated at the GSI facilities using the fragment separator FRS. The high-resolving power of this spectrometer makes it possible to obtain the isobaric charge-exchange cross sections with an accuracy of 3% and to separate quasi-elastic and inelastic contributions in the missing-energy spectra, in which the inelastic component is associated to the in-medium excitation of baryonic resonances such as the $\Delta$ resonance. We report on the results obtained for the (p,n) and (n,p) channels excited by using different targets that cover a large range in neutron excess., Comment: arXiv admin note: text overlap with arXiv:2004.06404

Published
2020

6. Photonuclear reactions with Zinc: A case for clinical linacs

Author

Boztosun, I., Đapo, H., Karakoç, M., Özmen, S. F., Çeçen, Y., Çoban, A., Caner, T., Bayram, E., Saito, T. R., Akdoğan, T., Bozkurt, V., Kuçuk, Y., Kaya, D., and Harakeh, M. N.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The use of bremsstrahlung photons produced by a linac to induce photonuclear reactions is wide spread. However, using a clinical linac to produce the photons is a new concept. We aimed to induce photonuclear reactions on zinc isotopes and measure the subsequent transition energies and half-lives. For this purpose, a bremsstrahlung photon beam of 18 MeV endpoint energy produced by the Philips SLI-25 linac has been used. The subsequent decay has been measured with a well-shielded single HPGe detector. The results obtained for transition energies are in good agreement with the literature data and in many cases surpass these in accuracy. For the half-lives, we are in agreement with the literature data, but do not achieve their precision. The obtained accuracy for the transition energies show what is achievable in an experiment such as ours. We demonstrate the usefulness and benefits of employing clinical linacs for nuclear physics experiments.

Published
2015
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7. Observation of Lambda H-4 hyperhydrogen by decay-pion spectroscopy in electron scattering

Author

Esser, A., Nagao, S., Schulz, F., Achenbach, P., Gayoso, C. Ayerbe, Böhm, R., Borodina, O., Bosnar, D., Bozkurt, V., Debenjak, L., Distler, M. O., Friščić, I., Fujii, Y., Gogami, T., Hashimoto, O., Hirose, S., Kanda, H., Kaneta, M., Kim, E., Kohl, Y., Kusaka, J., Margaryan, A., Merkel, H., Mihovilovič, M., Müller, U., Nakamura, S. N., Pochodzalla, J., Rappold, C., Reinhold, J., Saito, T. R., Lorente, A. Sanchez, Majos, S. Sánchez, Schlimme, B. S., Schoth, M., Sfienti, C., Širca, S., Tang, L., Thiel, M., Tsukada, K., Weber, A., and Yoshida, K.

Subjects
Nuclear Experiment
Abstract

At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a Be-9 target in order to study the ground-state masses of Lambda-hypernuclei. Positively charged kaons were detected by a short-orbit spectrometer with a broad momentum acceptance at zero degree forward angles with respect to the beam, efficiently tagging the production of strangeness in the target nucleus. In coincidence, negatively charged decay-pions were detected by two independent high-resolution spectrometers. About 10^3 pionic weak decays of hyperfragments and hyperons were observed. The pion momentum distribution shows a monochromatic peak at p_pi ~ 133 MeV/c, corresponding to the unique signature for the two-body decay of hyperhydrogen Lambda H-4 -> He-4 + pi-, stopped inside the target. Its binding energy was determined to be B_Lambda = 2.12 +- 0.01 (stat.) +- 0.09 (syst.) MeV with respect to the H-3 + Lambda mass.

Published
2015
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9. Hypernuclear event detection in the nuclear emulsion with Monte Carlo simulation and machine learning

Author

Japan Society for the Promotion of Science, Ministerio de Ciencia e Innovación (España), Comunidad de Madrid, Kasagi, A. [0000-0003-3924-6713], Drozd, V. [0000-0003-3324-8160], Ekawa, H. [0000-0003-3507-1469], Escrig, Samuel [0000-0002-3249-1794], Liu, E. [0000-0002-7152-6259], Rappold, C. [0000-0002-5390-5052], Saito, T. R. [0000-0002-7118-7349], Yoshida, J. [0000-0002-9398-746X], Yoshimoto, M. [0000-0002-4667-0718], Wang, H. [0000-0002-0161-8879], Kasagi, A., Dou, W., Drozd, V., Ekawa, H., Escrig, Samuel, Gao, Y., He, Y., Liu, E., Muneem, A., Nakagawa, M., Nakazawa, K., Rappold, Christophe, Saito, N., Saito, T. R., Sugimoto, S., Taki, M., Tanaka, Y. K., Yanai, A., Yoshida, J., Yoshimoto, M., Wang, H., Japan Society for the Promotion of Science, Ministerio de Ciencia e Innovación (España), Comunidad de Madrid, Kasagi, A. [0000-0003-3924-6713], Drozd, V. [0000-0003-3324-8160], Ekawa, H. [0000-0003-3507-1469], Escrig, Samuel [0000-0002-3249-1794], Liu, E. [0000-0002-7152-6259], Rappold, C. [0000-0002-5390-5052], Saito, T. R. [0000-0002-7118-7349], Yoshida, J. [0000-0002-9398-746X], Yoshimoto, M. [0000-0002-4667-0718], Wang, H. [0000-0002-0161-8879], Kasagi, A., Dou, W., Drozd, V., Ekawa, H., Escrig, Samuel, Gao, Y., He, Y., Liu, E., Muneem, A., Nakagawa, M., Nakazawa, K., Rappold, Christophe, Saito, N., Saito, T. R., Sugimoto, S., Taki, M., Tanaka, Y. K., Yanai, A., Yoshida, J., Yoshimoto, M., and Wang, H.

Abstract

This study developed a novel method for detecting hypernuclear events recorded in nuclear emulsion sheets using machine learning techniques. The artificial neural network-based object detection model was trained on surrogate images created through Monte Carlo simulations and image-style transformations using generative adversarial networks. The performance of the proposed model was evaluated using $\alpha$-decay events obtained from the J-PARC E07 emulsion data. The model achieved approximately twice the detection efficiency of conventional image processing and reduced the time spent on manual visual inspection by approximately 1/17. The established method was successfully applied to the detection of hypernuclear events. This approach is a state-of-the-art tool for discovering rare events recorded in nuclear emulsion sheets without any real data for training.

Published
2023

10. The WASA-FRS project at GSI and its perspective

Author

Saito, T. R., Achenbach, P., Alfaki, H. Alibrahim, Amjad, F., Armstrong, M., Behr, K. H., Benlliure, J., Brencic, Z., Dickel, T., Drozd, V., Dubey, S., Ekawa, H., Escrig, S., Feijoo-Fontan, M., Fujioka, H., Gao, Y., Geissel, H., Goldenbaum, F., Gonzalez, A. Grafia, Haettner, E., Harakeh, M. N., He, Y., Heggen, H., Hornung, C., Hubbard, N., Itahashi, K., Iwasaki, M., Kalantar-Nayestanaki, N., Kasagi, A., Kavatsyuk, M., Kazantseva, E., Khreptak, A., Kindler, B., Knoebel, R., Kollmus, H., Kostyleva, D., Kraft-Bermuth, S., Kurz, N., Liu, E., Lommel, B., Metag, V., Minami, S., Morrissey, D. J., Moskal, P., Mukha, I., Muneem, A., Nakagawa, M., Nakazawa, K., Nociforo, C., Ong, H. J., Pietri, S., Pochodzalla, J., Purushothaman, S., Rappold, C., Rocco, E., Rodriguez-Sanchez, J. L., Roy, P., Ruber, Roger, Schadmand, S., Scheidenberger, C., Schwarz, P., Sekiya, R., Serdyuk, V., Skurzok, M., Streicher, B., Suzuki, K., Szczepanczyk, B., Tanaka, Y. K., Tang, X., Tortorelli, N., Vencelj, M., Wang, H., Weber, T., Weick, H., Will, M., Wimmer, K., Yamamoto, A., Yanai, A., Yoshida, J., Zhao, J., Saito, T. R., Achenbach, P., Alfaki, H. Alibrahim, Amjad, F., Armstrong, M., Behr, K. H., Benlliure, J., Brencic, Z., Dickel, T., Drozd, V., Dubey, S., Ekawa, H., Escrig, S., Feijoo-Fontan, M., Fujioka, H., Gao, Y., Geissel, H., Goldenbaum, F., Gonzalez, A. Grafia, Haettner, E., Harakeh, M. N., He, Y., Heggen, H., Hornung, C., Hubbard, N., Itahashi, K., Iwasaki, M., Kalantar-Nayestanaki, N., Kasagi, A., Kavatsyuk, M., Kazantseva, E., Khreptak, A., Kindler, B., Knoebel, R., Kollmus, H., Kostyleva, D., Kraft-Bermuth, S., Kurz, N., Liu, E., Lommel, B., Metag, V., Minami, S., Morrissey, D. J., Moskal, P., Mukha, I., Muneem, A., Nakagawa, M., Nakazawa, K., Nociforo, C., Ong, H. J., Pietri, S., Pochodzalla, J., Purushothaman, S., Rappold, C., Rocco, E., Rodriguez-Sanchez, J. L., Roy, P., Ruber, Roger, Schadmand, S., Scheidenberger, C., Schwarz, P., Sekiya, R., Serdyuk, V., Skurzok, M., Streicher, B., Suzuki, K., Szczepanczyk, B., Tanaka, Y. K., Tang, X., Tortorelli, N., Vencelj, M., Wang, H., Weber, T., Weick, H., Will, M., Wimmer, K., Yamamoto, A., Yanai, A., Yoshida, J., and Zhao, J.

Abstract

A novel technique to study bound states of exotic hadrons in subatomic nuclei, such as hypernuclei and mesic nuclei, has been developed by employing the Fragment Separator FRS and the WASA central detector at GSI. Two experiments, S447 for studying light hypernuclei, especially hypertriton and a Ann bound state, and S490 for searching for ri' mesic-nuclei, were recently performed. Data analyses are currently in progress, and light charged particles such as protons and x & PLUSMN; are clearly observed and identified in the both experiments. For S447, light nuclear fragments that can also be residual nuclei from decays of hypernuclei of interests have been analysed by the FRS, and a momentum resolution, Ap/p, of 5 x 10-4 has been achieved. Further data analyses are to be completed. The WASA-FRS project will be continued and extended with the FRS at FAIR Phase 0, and upgrading of the WASA magnet and detectors is currently in progress. Furthermore, construction of a larger detector system with the Super-FRS at FAIR Phase 1 is also under consideration.

Published
2023
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11. Studies of three-and four-body hypernuclei with heavy-ion beams, nuclear emulsions and machine learning

Author

Saito, T. R., Achenbach, P., Alfaki, H. Alibrahim, Amjad, F., Armstrong, M., Behr, K. -H, Benlliure, J., Brencic, Z., Dickel, T., Drozd, V., Dubey, S., Ekawa, H., Escrig, S., Feijoo-Fontan, M., Gao, Y., Geissel, H., Goldenbaum, F., Gonzalez, A. Grana, Haettner, E., Harakeh, M. N., He, Y., Heggen, H., Hornung, C., Hubbard, N., Itahashi, K., Kalantar-Nayestanaki, N., Kasagi, A., Kavatsyuk, M., Kazantseva, E., Khreptak, A., Knoebel, R., Kollmus, H., Kostyleva, D., Kraft-Bermuth, S., Kurz, N., Liu, E., Minami, S., Morrissey, D. J., Moskal, P., Mukha, I., Muneem, A., Nakagawa, M., Nakazawa, K., Nociforo, C., Ong, H. J., Pietri, S., Pochodzalla, J., Purushothaman, S., Rappold, C., Rocco, E., Rodriguez-Sanchez, J. L., Roy, P., Ruber, Roger, Saito, N., Schadmand, S., Scheidenberger, C., Schwarz, P., Sekiya, R., Serdyuk, V., Skurzok, M., Streicher, B., Sugimoto, S., Suzuki, K., Szczepanczyk, B., Taki, M., Tanaka, Y. K., Tang, X., Tortorelli, N., Vencelj, M., Wang, H., Weber, T., Weick, H., Will, M., Wimmer, K., Yamamoto, A., Yanai, A., Yoshida, J., Yoshimoto, M., Zhao, J., Saito, T. R., Achenbach, P., Alfaki, H. Alibrahim, Amjad, F., Armstrong, M., Behr, K. -H, Benlliure, J., Brencic, Z., Dickel, T., Drozd, V., Dubey, S., Ekawa, H., Escrig, S., Feijoo-Fontan, M., Gao, Y., Geissel, H., Goldenbaum, F., Gonzalez, A. Grana, Haettner, E., Harakeh, M. N., He, Y., Heggen, H., Hornung, C., Hubbard, N., Itahashi, K., Kalantar-Nayestanaki, N., Kasagi, A., Kavatsyuk, M., Kazantseva, E., Khreptak, A., Knoebel, R., Kollmus, H., Kostyleva, D., Kraft-Bermuth, S., Kurz, N., Liu, E., Minami, S., Morrissey, D. J., Moskal, P., Mukha, I., Muneem, A., Nakagawa, M., Nakazawa, K., Nociforo, C., Ong, H. J., Pietri, S., Pochodzalla, J., Purushothaman, S., Rappold, C., Rocco, E., Rodriguez-Sanchez, J. L., Roy, P., Ruber, Roger, Saito, N., Schadmand, S., Scheidenberger, C., Schwarz, P., Sekiya, R., Serdyuk, V., Skurzok, M., Streicher, B., Sugimoto, S., Suzuki, K., Szczepanczyk, B., Taki, M., Tanaka, Y. K., Tang, X., Tortorelli, N., Vencelj, M., Wang, H., Weber, T., Weick, H., Will, M., Wimmer, K., Yamamoto, A., Yanai, A., Yoshida, J., Yoshimoto, M., and Zhao, J.

Abstract

Interests on few-body hypernuclei have been increased by recent results of experiments employing relativistic heavy ion beams. Some of the experiments have revealed that the lifetime of the lightest hypernucleus, hypertriton, is significantly shorter than 263 ps which is expected by considering the hypertriton to be a weakly-bound system. The STAR collaboration has also measured the hypertriton binding energy, and the deduced value is contradicting to its formerly known small binding energy. These measurements have indicated that the fundamental physics quantities of the hypertriton such as its lifetime and binding energy have not been understood, therefore, they have to be measured very precisely. Furthermore, an unprecedented Lambda nn bound state observed by the HypHI collaboration has to be studied in order to draw a conclusion whether or not such a bound state exists. These three-body hypernuclear states are studied by the heavy-ion beam data in the WASA-FRS experiment and by analysing J-PARC E07 nuclear emulsion data with machine learning.

Published
2023
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12. Spectroscopy of η'-mesic Nuclei with WASA at GSI/FAIR

Author

Tanaka, Y. K., Bagchi, S., Haettner, E., Harakeh, M. N., Hayano, R. S., Hirenzaki, S., Hornung, C., Igarashi, Y., Ikeno, N., Itahashi, K., Iwasaki, M., Jido, D., Benlliure, J., Kalantar-Nayestanaki, N., Kanungo, R., Kindler, B., Knöbel, R., Kostyleva, D., Kurz, N., Kuzminchuk, N., Lommel, B., Ma, Y., Matsumoto, S. Y., Dickel, T., Metag, V., Minami, S., Moskal, P., Mukha, I., Nagae, T., Nagahiro, H., Nakagawa, M., Ong, H. J., Outa, H., Pietri, S., Drozd, V., Plass, W. R., Prochazka, A., Purushothaman, S., Rappold, C., Ritman, J., Rodríguez-Sánchez, J. L., Ruber, R., Rundel, O., Saito, T. R., Scheidenberger, C., Ekawa, H., Sekiya, R., Serdyuk, V., Simon, H., Sitar, B., Skurzok, M., Strmen, P., Sun, B., Szarka, I., Takechi, M., Tanihata, I., Fujioka, H., Terashima, S., Weick, H., Yamamoto, A., Zhao, J., Geissel, H., Goldenbaum, F., and Guo, C.

Subjects
ddc:530
Abstract

We plan to conduct an experimental search for η′-mesic nuclei in order to investigate in-medium properties of the η′ meson. A 2.5 GeV proton beam is employed to produce η′-mesic 11C nuclei with the 12C(p,d)η′⊗11C reaction. Simultaneous measurements of the forward ejected deuterons and decay protons from η′-mesic nuclei will allow us to achieve high experimental sensitivity. The experiment will be performed at GSI by making full use of the fragment separator FRS and the WASA detector system. The plan of this proposed experiment is described.

Published
2020

13. Search for eta '-mesic nuclei using (p,d) reaction with FRS/Super-FRS at GSI/FAIR

Author

Tanaka, Y. K., Bagchi, S., Benlliure, J., Dickel, T., Drozd, V, Ekawa, H., Fujioka, H., Geissel, H., Goldenbaum, F., Guo, C., Haettner, E., Harakeh, M. N., Hayano, R. S., Hirenzaki, S., Hornung, C., Igarashi, Y., Ikeno, N., Itahashi, K., Iwasaki, M., Jido, D., Kalantar-Nayestanaki, N., Kanungo, R., Kindler, B., Knoebel, R., Kostyleva, D., Kurz, N., Kuzminchuk, N., Lommel, B., Ma, Y., Matsumoto, S. Y., Metag, V, Minami, S., Moskal, P., Mukha, I, Nagae, T., Nagahiro, H., Nakagawa, M., Ong, H. J., Outa, H., Pietri, S., Plass, W. R., Prochazka, A., Purushothaman, S., Rappold, C., Ritman, J., Rodriguez-Sanchez, J. L., Ruber, Roger, Rundel, O., Saito, T. R., Scheidenberger, C., Sekiya, R., Serdyuk, V, Simon, H., Sitar, B., Skurzok, M., Strmen, P., Sun, B., Szarka, I, Takechi, M., Tanihata, I, Terashima, S., Weick, H., Yamamoto, A., Zhao, J., Tanaka, Y. K., Bagchi, S., Benlliure, J., Dickel, T., Drozd, V, Ekawa, H., Fujioka, H., Geissel, H., Goldenbaum, F., Guo, C., Haettner, E., Harakeh, M. N., Hayano, R. S., Hirenzaki, S., Hornung, C., Igarashi, Y., Ikeno, N., Itahashi, K., Iwasaki, M., Jido, D., Kalantar-Nayestanaki, N., Kanungo, R., Kindler, B., Knoebel, R., Kostyleva, D., Kurz, N., Kuzminchuk, N., Lommel, B., Ma, Y., Matsumoto, S. Y., Metag, V, Minami, S., Moskal, P., Mukha, I, Nagae, T., Nagahiro, H., Nakagawa, M., Ong, H. J., Outa, H., Pietri, S., Plass, W. R., Prochazka, A., Purushothaman, S., Rappold, C., Ritman, J., Rodriguez-Sanchez, J. L., Ruber, Roger, Rundel, O., Saito, T. R., Scheidenberger, C., Sekiya, R., Serdyuk, V, Simon, H., Sitar, B., Skurzok, M., Strmen, P., Sun, B., Szarka, I, Takechi, M., Tanihata, I, Terashima, S., Weick, H., Yamamoto, A., and Zhao, J.

Abstract

We plan a semi-exclusive measurement of the C-12(p,dp) reaction to search for eta'-mesic nuclei, aiming at investigating in-medium properties of the eta'-meson. We employ a 2.5 GeV proton beam impinging on a carbon target to produce eta'-mesic C-11 nuclei via the C-12(p,d)eta'circle times C-11 reaction. Using coincidence measurements of the forward going deuterons, important for missing-mass spectroscopy, and decay protons emitted from the eta'-mesic nuclei for event selection will provide a high experimental sensitivity to observe eta'-mesic nuclei. We will perform the measurements by combining the WASA detector system with the fragment separator FRS at GSI and also with the Super-FRS at FAIR in the future. The plan of the experiments and the present status are reported.

Published
2020
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14. Search for η’-mesic nuclei using (p,d) reaction with FRS/Super-FRS at GSI/FAIR

Author

Tanaka, Y. K., primary, Bagchi, S., additional, Benlliure, J., additional, Dickel, T., additional, Drozd, V., additional, Ekawa, H., additional, Fujioka, H., additional, Geissel, H., additional, Goldenbaum, F., additional, Guo, C., additional, Haettner, E., additional, Harakeh, M. N., additional, Hayano, R.S., additional, Hirenzaki, S., additional, Hornung, C., additional, Igarashi, Y., additional, Ikeno, N., additional, Itahashi, K., additional, Iwasaki, M., additional, Jido, D., additional, Kalantar-Nayestanaki, N., additional, Kanungo, R., additional, Kindler, B., additional, Knöbel, R., additional, Kostyleva, D., additional, Kurz, N., additional, Kuzminchuk, N., additional, Lommel, B., additional, Ma, Y., additional, Matsumoto, S. Y., additional, Metag, V., additional, Minami, S., additional, Moskal, P., additional, Mukha, I., additional, Nagae, T., additional, Nagahiro, H., additional, Nakagawa, M., additional, Ong, H. J., additional, Outa, H., additional, Pietri, S., additional, Plass, W. R., additional, Prochazka, A., additional, Purushothaman, S., additional, Rappold, C., additional, Ritman, J., additional, Rodríguez-Sánchez, J.L., additional, Ruber, R., additional, Rundel, O., additional, Saito, T. R., additional, Scheidenberger, C., additional, Sekiya, R., additional, Serdyuk, V., additional, Simon, H., additional, Sitar, B., additional, Skurzok, M., additional, Strmen, P., additional, Sun, B., additional, Szarka, I., additional, Takechi, M., additional, Tanihata, I., additional, Terashima, S., additional, Weick, H., additional, Yamamoto, A., additional, and Zhao, J., additional

Published
2020
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15. Isobaric charge-exchange reactions: a tool to study the excitation of baryonic resonances in exotic nuclear matter

Author

Rodríguez-Sánchez, J L, primary, Benlliure, J, additional, Haettner, E, additional, Scheidenberger, C, additional, Vargas, J, additional, Ayyad, Y, additional, Alvarez-Pol, H, additional, Atkinson, J, additional, Aumann, T, additional, Beceiro-Novo, S, additional, Boretzky, K, additional, Caamaño, M, additional, Casarejos, E, additional, Cortina-Gil, D, additional, Fernández, P Díaz, additional, Estrade, A, additional, Geissel, H, additional, Itahashi, K, additional, Kelić-Heil, A, additional, Lenske, H, additional, Litvinov, Yu A, additional, Paradela, C, additional, Pérez-Loureiro, D, additional, Pietri, S, additional, Prochazka, A, additional, Saito, T R, additional, Takechi, M, additional, Tanaka, Y K, additional, Vidaña, I, additional, Weick, H, additional, and Winfield, J S, additional

Published
2020
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16. Excitation of baryonic resonances in stable medium-mass nuclei of Sn

Author

Rodríguez-Sánchez, J L, primary, Benlliure, J, additional, Haettner, E, additional, Scheidenberger, C, additional, Vargas, J, additional, Ayyad, Y, additional, Alvarez-Pol, H, additional, Atkinson, J, additional, Aumann, T, additional, Beceiro-Novo, S, additional, Boretzky, K, additional, Caamaño, M, additional, Casarejos, E, additional, Cortina-Gil, D, additional, DÍaz Fernández, P, additional, Estrade, A, additional, Geissel, H, additional, Itahashi, K, additional, Kelić-Heil, A, additional, Lenske, H, additional, Litvinov, Yu A, additional, Paradela, C, additional, Pérez-Loureiro, D, additional, Pietri, S, additional, Prochazka, A, additional, Saito, T R, additional, Takechi, M, additional, Tanaka, Y K, additional, Vidaña, I, additional, Weick, H, additional, and Winfield, J S, additional

Published
2020
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17. Excitation of Baryonic Resonances in Isobaric Charge-Exchange Reactions of Medium-Mass Nuclei

Author

Rodríguez-Sánchez, J. L., primary, Benlliure, J., additional, Haettner, E., additional, Scheidenberger, C., additional, Vargas, J., additional, Ayyad, Y., additional, Alvarez-Pol, H., additional, Atkinson, J., additional, Aumann, T., additional, Beceiro-Novo, S., additional, Boretzky, K., additional, Caamaño, M., additional, Casarejos, E., additional, Cortina-Gil, D., additional, Díaz Fernández, P., additional, Estrade, A., additional, Geissel, H., additional, Itahashi, K., additional, Kelić-Heil, A., additional, Lenske, H., additional, Litvinov, Yu. A., additional, Paradela, C., additional, Pérez-Loureiro, D., additional, Pietri, S., additional, Prochazka, A., additional, Saito, T. R., additional, Takechi, M., additional, Tanaka, Y. K., additional, Vidaña, I., additional, Weick, H., additional, and Winfield, J. S., additional

Published
2020
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19. The telemetric monitoring of heart rate during copulatory behavior in the male rat

Author

Saito, T R, Hokao, R, Terada, M, Takahashi, K W, Tsubone, H, and Sugano, S

Abstract

We have studied the physiological and behavioral responses in male rats to copulation and exercise. For this purpose, electrocardiographys (ECGs) were recorded from conscious and unrestrained rats using radiotelemetry system, Heart rate during copulation rose sharpiy following the induction of a receptive female, showed a peak of about 520 bpm during each ejaculation series, and then rapidly decreased. To compare the rate of decrease after ejaculation with that following vigorous exercise, we run male rats on a motor wheel until heart rate became to the same value during ejaculation. Foliewing the cessation of exercise, heart rate decreased gradually. The possible role of the autonomic nervous system in the changes of heart rate during copulation and exercise is discussed., Scandinavian Journal of Laboratory Animal Sciences, Vol. 28 No. 2 (2001)

Published
2019
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20. Beam helicity asymmetries in K+ΛK+Λ electroproduction off the proton at low Q2

Author

Achenbach, P., Gayoso, C. Ayerbe, Boehm, R., Borodina, O., Bosnar, D., Bozkurt, V., Bydzovsky, P., Debenjak, L., Distler, M. O., Esser, A., Friščić, I., Fujii, Y., Gogami, T., Rodriguez, M. Gomez, Hashimoto, O., Hirose, S., Kanda, H., Kaneta, M., Kim, E., Margaryan, A., Merkel, H., Mueller, U., Nagao, S., Nakamura, S. N., Pochodzalla, J., Rappold, C., Reinhold, J., Saito, T. R., Lorente, A. Sanchez, Majos, S. Sanchez, Schlimme, B. S., Schoth, M., Schulz, F., Sfienti, C., Sirca, S., Skoupil, D., Tang, L., Thiel, M., and Tsukada, K.

Subjects
Beam helicity asymmetries, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Beam helicity asymmetries in the ep → e K+Λ reaction have been measured at unprecedentedly low four-momentum transfers Q2 =0 .05 (GeV/c)2. At the Mainz Microtron (MAMI), the experiment was performed with a longitudinally polarized beam and an out-of-plane detection of the scattered electron. This experiment probed the associated helicity-dependent structure function dσLT /dΩc.m. K , which is sensitive to the details of resonances of the proton. The results were compared to models for kaon electroproduction using effective Lagrangians. The MAMI data is not supporting the Kaon-Maid isobar model, which uses strong longitudinal couplings of the virtual photon to nucleon resonances and predicts a strong peaking of the structure function at forward angles and low Q2. The data is also in disagreement with a Regge-plusresonance model that predicts the incorrect sign of the structure function. The combination of the MAMI results with data taken at higher four-momentum transfers measured at Jefferson Lab indicates a smooth transition in Q2 without significant changes of the interference pattern in the electroproduction process.

Published
2017

21. Observation of ^4_ΛH Hyperhydrogen by Decay-Pion Spectroscopy in Electron Scattering

Author

Esser, A., Nagao, S., Schulz, F., Achenbach, P., Ayerbe Gayoso, C., Bohm, R., Borodina, O., Bosnar, Damir, Bozkurt, V., Debenjak, L., Distler, M. O., Friščić, Ivica, Fujii, Y., Gogami, T., Hashimoto, O., Hirose, S., Kanda, H., Kaneta, M., Kim, E., Kohl, Y., Kusaka, J., Margaryan, A., Merkel, H., Mihovilovć, M., Muller, U., Nakamura, S. N., Pochodzalla, J., Rappold, C., Reinhold, J., Saito, T. R., Sanchez Lorente, A., Sánchez Majos, S., Schlimme, B. S., Schoth, M., Sfienti, C., Širca, S., Tang, L., Thiel, M., Tsukada, K., Weber, A., and Yoshida, K.

Subjects
PRIRODNE ZNANOSTI. Fizika, Nuclear Theory, Hypernuclei, KAOS, High Energy Physics::Experiment, Decay-Pion Spectroscopy, Electron Scattering, Nuclear Experiment, MAMI, NATURAL SCIENCES. Physics
Abstract

At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a ^9Be target in order to study the Λ binding energy of light hypernuclei. Positively charged kaons were detected by a short-orbit spectrometer with a broad momentum acceptance at 0° forward angles with respect to the beam, efficiently tagging the production of strangeness in the target nucleus. Coincidentally, negatively charged decay pions were detected by two independent high-resolution spectrometers. About 10^3 pionic weak decays of hyperfragments and hyperons were observed. The pion momentum distribution shows a monochromatic peak at p_π ≈ 133 MeV=c, corresponding to the unique signature for the two-body decay of hyperhydrogen ^4_ΛH → ^4He + π^−, stopped inside the target. Its Λ binding energy was determined to be B_Λ = 2.12 ± 0.01 (stat) ± 0.09 ðsystÞMeV with respect to the ^3H + Λ mass.

Published
2015

22. Photonuclear reactions with zinc: A case for clinical linacs

Author

Boztosun, I., primary, Ðapo, H., additional, Karakoç, M., additional, Özmen, S. F., additional, Çeçen, Y., additional, Çoban, A., additional, Caner, T., additional, Bayram, E., additional, Saito, T. R., additional, Akdoğan, T., additional, Bozkurt, V., additional, Kuçuk, Y., additional, Kaya, D., additional, and Harakeh, M. N., additional

Published
2015
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23. Photonuclear reactions induced by a clinical linac

Author

Boztosun, I, primary, Dapo, H, additional, Karakoc, M, additional, Ozmen, S F, additional, Cecen, Y, additional, Coban, A, additional, Cesur, A, additional, Caner, T, additional, Bayram, E, additional, Saito, T R, additional, Akdogan, T, additional, Bozkurt, V, additional, Kaya, D, additional, and Kucuk, Y, additional

Published
2015
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24. Photonuclear reactions with zinc: A case for clinical linacs

Author

T.R. Saito, Ismail Boztosun, T. Akdogan, Edip Bayram, D. Kaya, Yiğit Çeçen, Y. Kucuk, Abdullah Coban, Haris Dapo, V. Bozkurt, Mohsen Harakeh, Suleyman Fatih Ozmen, M. Karakoc, T. Caner, Research unit Nuclear & Hadron Physics, 0-Belirlenecek, Dapo, Haris -- 0000-0001-9767-1625, Karakoc, Mesut -- 0000-0002-8549-5633, Kaya, Deniz -- 0000-0002-1951-2466, cecen, yigit -- 0000-0001-7825-3225, and [Boztosun, I. -- Dapo, H. -- Karakoc, M. -- Ozmen, S. F. -- Coban, A. -- Caner, T. -- Kucuk, Y. -- Kaya, D.] Akdeniz Univ, Dept Phys, TR-07058 Antalya, Turkey -- [Boztosun, I. -- Dapo, H. -- Karakoc, M. -- Ozmen, S. F. -- Cecen, Y. -- Coban, A. -- Caner, T. -- Kucuk, Y. -- Kaya, D.] Akdeniz Univ, Nucl Res & Applicat Ctr, TR-07058 Antalya, Turkey -- [Cecen, Y.] Akdeniz Univ, Dept Radiat Oncol, TR-07058 Antalya, Turkey -- [Bayram, E.] Akdeniz Univ, Dept Chem, TR-07058 Antalya, Turkey -- [Saito, T. R.] GSI Helmholtz Ctr Heavy Ion Res, D-64291 Darmstadt, Germany -- [Saito, T. R.] Johannes Gutenberg Univ Mainz, D-55099 Mainz, Germany -- [Saito, T. R.] HIM, D-55099 Mainz, Germany -- [Akdogan, T.] Bogazici Univ, Dept Phys, TR-34342 Istanbul, Turkey -- [Bozkurt, V.] Nigde Univ, TR-51100 Nigde, Turkey -- [Harakeh, M. N.] Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands

Subjects
Physics - Instrumentation and Detectors, Photon, RAY, General Physics and Astronomy, FOS: Physical sciences, NUCLEAR, 01 natural sciences, 7. Clean energy, Linear particle accelerator, S-DALINAC, Nuclear physics, Nucleosynthesis, 0103 physical sciences, SCATTERING, FACILITY, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, GA-67, Physics, NUCLEOSYNTHESIS, 010308 nuclear & particles physics, Scattering, Bremsstrahlung, Instrumentation and Detectors (physics.ins-det), 0-Belirlenecek, 3. Good health, Physics::Accelerator Physics, Hpge detector, DECAY, Bremsstrahlung photon, Beam (structure)
Abstract

WOS: 000365732300003, The use of bremsstrahlung photons produced by a linac to induce photonuclear reactions is wide spread. However, using a clinical linac to produce the photons is a new concept. We aimed to induce photonuclear reactions on zinc isotopes and measure the subsequent transition energies and half-lives. For this purpose, a bremsstrahlung photon beam of 18 MeV endpoint energy produced by the Philips SLI-25 linac has been used. The subsequent decay has been measured with a well-shielded single HPGe detector. The results obtained for transition energies are in good agreement with the literature data and in many cases surpass these in accuracy. For the half-lives, we are in agreement with the literature data, but do not achieve their precision. The obtained accuracy for the transition energies show what is achievable in an experiment such as ours. We demonstrate the usefulness and benefits of employing clinical linacs for nuclear physics experiments., Akdeniz University Hospital; TUBITAK-MFAG [114F220]; 2216-Foreigner Research program, We would like to thank the Akdeniz University Hospital for their generous support. The project has also received administrative support from the office of the Akdeniz University Rectorate. In addition, the project and its various contributors have been supported in part by TUBITAK-MFAG 114F220 and the 2216-Foreigner Research program. The authors would also like to thank Dr. Deniz Savran for very enlightening discussions regarding our data analysis in respect to half-life determination.

Published
2015

25. Photonuclear reactions induced by a clinical linac

Author

Yiğit Çeçen, V. Bozkurt, T.R. Saito, A. Cesur, M. Karakoc, T. Akdogan, D. Kaya, T. Caner, Haris Dapo, Y. Kucuk, Edip Bayram, Ismail Boztosun, Suleyman Fatih Ozmen, Abdullah Coban, 0-Belirlenecek, Dapo, Haris -- 0000-0001-9767-1625, cecen, yigit -- 0000-0001-7825-3225, Kaya, Deniz -- 0000-0002-1951-2466, Karakoc, Mesut -- 0000-0002-8549-5633, and [Boztosun, I. -- Dapo, H. -- Karakoc, M. -- Ozmen, S. F. -- Cecen, Y. -- Coban, A. -- Cesur, A. -- Caner, T. -- Bayram, E. -- Kaya, D. -- Kucuk, Y.] Akdeniz Univ, Dept Phys, TR-07058 Antalya, Turkey -- [Boztosun, I. -- Dapo, H. -- Karakoc, M. -- Ozmen, S. F. -- Coban, A. -- Cesur, A. -- Caner, T. -- Kaya, D. -- Kucuk, Y.] Akdeniz Univ, Nucl Res & Applicat Ctr, TR-07058 Antalya, Turkey -- [Cecen, Y.] Akdeniz Univ, Dept Radiat Oncol, TR-07058 Antalya, Turkey -- [Bayram, E.] Akdeniz Univ, Dept Chem, TR-07058 Antalya, Turkey -- [Saito, T. R. -- Bozkurt, V.] CSI Helmholtz Ctr Heavy Ion Res, D-64291 Darmstadt, Germany -- [Saito, T. R.] Johannes Gutenberg Univ Mainz, D-55099 Mainz, Germany -- [Saito, T. R.] HIM, D-55099 Mainz, Germany -- [Akdogan, T.] Bogazici Univ, Dept Phys, TR-80815 Bebek, Turkey -- [Bozkurt, V.] Nigde Univ, TR-51100 Nigde, Turkey

Subjects
Physics, Nuclear physics, History, Irradiation, 0-Belirlenecek, Beam (structure), Bremsstrahlung photon, Linear particle accelerator, 3. Good health, Computer Science Applications, Education, Semiconductor detector
Abstract

1st NUBA International Conference on Nuclear Physics and Astrophysics -- SEP 14-21, 2014 -- Akdeniz Univ, Antalya, TURKEY, WOS: 000354773900024, The use of a clinical linac in photonuclear experiments is a novel concept. At Akdeniz University a program has been started focused on inducing photonuclear reactions with a Philips SLI-25 clinical linac. A bremsstrahlung photon beam produced by the linac is used to create radioactive nuclei. The decay of said nuclei is observed with a high-purity germanium detector. During the course of the experiment the spectrum of the irradiated sample is recorded. By analyzing the spectrum the energies of gamma-ray transitions in the daughter nuclei as well as the half-life of the parent nucleus are obtained. The results obtained thus far, starting with Zinc nuclei will be presented.

Published
2015

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