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Title: Characteristics of signals originating near the lithium-diffused N+ contact of high purity germanium p-type point contact detectors

Abstract

A study of signals originating near the lithium-diffused n+ contact of p-type point contact (PPC) high purity germanium detectors (HPGe) is presented. The transition region between the active germanium and the fully dead layer of the n+ contact is examined. Energy depositions in this transition region are shown to result in partial charge collection. This provides a mechanism for events with a well defined energy to contribute to the continuum of the energy spectrum at lower energies. A novel technique to quantify the contribution from this source of background is introduced. Furthermore, experiments that operate germanium detectors with a very low energy threshold may benefit from the methods presented herein.

Authors:
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Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
The Majorana Collaboration
OSTI Identifier:
1072839
Report Number(s):
PNNL-SA-94073
Journal ID: ISSN 0168-9002; PII: S0168900212012752
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 701; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; germanium detectors; dead layer; transition layer

Citation Formats

Aguayo, E., Amman, M., Avignone, F. T., Barabash, A. S., Barton, P. J., Beene, J. R., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Chan, Y. -D., Christofferson, C. D., Collar, J. I., Combs, D. C., Cooper, R. J., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Esterline, J., Fast, J. E., Fields, N., Finnerty, P., Fraenkle, F. M., Galindo-Uribarri, A., Gehman, V. M., Giovanetti, G. K., Green, M. P., Guiseppe, V. E., Gusey, K., Hallin, A. L., Hazama, R., Henning, R., Hoppe, E. W., Horton, M., Howard, S., Howe, M. A., Johnson, R. A., Keeter, K. J., Kidd, M. F., Knecht, A., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., Leviner, L. E., Loach, J. C., Looker, Q., Luke, P. N., MacMullin, S., Marino, M. G., Martin, R. D., Merriman, J. H., Miller, M. L., Mizouni, L., Nomachi, M., Orrell, J. L., Overman, N. R., Perumpilly, G., Phillips, D. G., Poon, A. W. P., Radford, D. C., Rielage, K., Robertson, R. G. H., Ronquest, M. C., Schubert, A. G., Shima, T., Shirchenko, M., Snavely, K. J., Steele, D., Strain, J., Timkin, V., Tornow, W., Varner, R. L., Vetter, K., Vorren, K., Wilkerson, J. F., Yakushev, E., Yaver, H., Young, A. R., Yu, C. -H., and Yumatov, V. Characteristics of signals originating near the lithium-diffused N+ contact of high purity germanium p-type point contact detectors. United States: N. p., 2012. Web. doi:10.1016/j.nima.2012.11.004.
Aguayo, E., Amman, M., Avignone, F. T., Barabash, A. S., Barton, P. J., Beene, J. R., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Chan, Y. -D., Christofferson, C. D., Collar, J. I., Combs, D. C., Cooper, R. J., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Esterline, J., Fast, J. E., Fields, N., Finnerty, P., Fraenkle, F. M., Galindo-Uribarri, A., Gehman, V. M., Giovanetti, G. K., Green, M. P., Guiseppe, V. E., Gusey, K., Hallin, A. L., Hazama, R., Henning, R., Hoppe, E. W., Horton, M., Howard, S., Howe, M. A., Johnson, R. A., Keeter, K. J., Kidd, M. F., Knecht, A., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., Leviner, L. E., Loach, J. C., Looker, Q., Luke, P. N., MacMullin, S., Marino, M. G., Martin, R. D., Merriman, J. H., Miller, M. L., Mizouni, L., Nomachi, M., Orrell, J. L., Overman, N. R., Perumpilly, G., Phillips, D. G., Poon, A. W. P., Radford, D. C., Rielage, K., Robertson, R. G. H., Ronquest, M. C., Schubert, A. G., Shima, T., Shirchenko, M., Snavely, K. J., Steele, D., Strain, J., Timkin, V., Tornow, W., Varner, R. L., Vetter, K., Vorren, K., Wilkerson, J. F., Yakushev, E., Yaver, H., Young, A. R., Yu, C. -H., & Yumatov, V. Characteristics of signals originating near the lithium-diffused N+ contact of high purity germanium p-type point contact detectors. United States. doi:10.1016/j.nima.2012.11.004.
Aguayo, E., Amman, M., Avignone, F. T., Barabash, A. S., Barton, P. J., Beene, J. R., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Chan, Y. -D., Christofferson, C. D., Collar, J. I., Combs, D. C., Cooper, R. J., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Esterline, J., Fast, J. E., Fields, N., Finnerty, P., Fraenkle, F. M., Galindo-Uribarri, A., Gehman, V. M., Giovanetti, G. K., Green, M. P., Guiseppe, V. E., Gusey, K., Hallin, A. L., Hazama, R., Henning, R., Hoppe, E. W., Horton, M., Howard, S., Howe, M. A., Johnson, R. A., Keeter, K. J., Kidd, M. F., Knecht, A., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., Leviner, L. E., Loach, J. C., Looker, Q., Luke, P. N., MacMullin, S., Marino, M. G., Martin, R. D., Merriman, J. H., Miller, M. L., Mizouni, L., Nomachi, M., Orrell, J. L., Overman, N. R., Perumpilly, G., Phillips, D. G., Poon, A. W. P., Radford, D. C., Rielage, K., Robertson, R. G. H., Ronquest, M. C., Schubert, A. G., Shima, T., Shirchenko, M., Snavely, K. J., Steele, D., Strain, J., Timkin, V., Tornow, W., Varner, R. L., Vetter, K., Vorren, K., Wilkerson, J. F., Yakushev, E., Yaver, H., Young, A. R., Yu, C. -H., and Yumatov, V. Fri . "Characteristics of signals originating near the lithium-diffused N+ contact of high purity germanium p-type point contact detectors". United States. doi:10.1016/j.nima.2012.11.004. https://www.osti.gov/servlets/purl/1072839.
@article{osti_1072839,
title = {Characteristics of signals originating near the lithium-diffused N+ contact of high purity germanium p-type point contact detectors},
author = {Aguayo, E. and Amman, M. and Avignone, F. T. and Barabash, A. S. and Barton, P. J. and Beene, J. R. and Bertrand, F. E. and Boswell, M. and Brudanin, V. and Busch, M. and Chan, Y. -D. and Christofferson, C. D. and Collar, J. I. and Combs, D. C. and Cooper, R. J. and Detwiler, J. A. and Doe, P. J. and Efremenko, Yu. and Egorov, V. and Ejiri, H. and Elliott, S. R. and Esterline, J. and Fast, J. E. and Fields, N. and Finnerty, P. and Fraenkle, F. M. and Galindo-Uribarri, A. and Gehman, V. M. and Giovanetti, G. K. and Green, M. P. and Guiseppe, V. E. and Gusey, K. and Hallin, A. L. and Hazama, R. and Henning, R. and Hoppe, E. W. and Horton, M. and Howard, S. and Howe, M. A. and Johnson, R. A. and Keeter, K. J. and Kidd, M. F. and Knecht, A. and Kochetov, O. and Konovalov, S. I. and Kouzes, R. T. and LaFerriere, B. D. and Leon, J. and Leviner, L. E. and Loach, J. C. and Looker, Q. and Luke, P. N. and MacMullin, S. and Marino, M. G. and Martin, R. D. and Merriman, J. H. and Miller, M. L. and Mizouni, L. and Nomachi, M. and Orrell, J. L. and Overman, N. R. and Perumpilly, G. and Phillips, D. G. and Poon, A. W. P. and Radford, D. C. and Rielage, K. and Robertson, R. G. H. and Ronquest, M. C. and Schubert, A. G. and Shima, T. and Shirchenko, M. and Snavely, K. J. and Steele, D. and Strain, J. and Timkin, V. and Tornow, W. and Varner, R. L. and Vetter, K. and Vorren, K. and Wilkerson, J. F. and Yakushev, E. and Yaver, H. and Young, A. R. and Yu, C. -H. and Yumatov, V.},
abstractNote = {A study of signals originating near the lithium-diffused n+ contact of p-type point contact (PPC) high purity germanium detectors (HPGe) is presented. The transition region between the active germanium and the fully dead layer of the n+ contact is examined. Energy depositions in this transition region are shown to result in partial charge collection. This provides a mechanism for events with a well defined energy to contribute to the continuum of the energy spectrum at lower energies. A novel technique to quantify the contribution from this source of background is introduced. Furthermore, experiments that operate germanium detectors with a very low energy threshold may benefit from the methods presented herein.},
doi = {10.1016/j.nima.2012.11.004},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 701,
place = {United States},
year = {2012},
month = {11}
}

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