{"_buckets": {"deposit": "41e347be-57f9-4b7b-a127-3116107bd72c"}, "_deposit": {"id": "11352", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "11352"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00011352"}, "item_9_alternative_title_19": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u8a00\u8a9e\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "Status of \u003c14\u003e^C Measurements with a Tandetron Accelerator Mass Spectrometer at Nagoya University in the year 1992"}]}, "item_9_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1993-03", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "126", "bibliographicPageStart": "110", "bibliographicVolumeNumber": "4", "bibliographic_titles": [{"bibliographic_title": "\u540d\u53e4\u5c4b\u5927\u5b66\u52a0\u901f\u5668\u8cea\u91cf\u5206\u6790\u8a08\u696d\u7e3e\u5831\u544a\u66f8"}]}]}, "item_9_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "radiocarbon (^\u003c14\u003eC). The spectrometer consists of a Cs sputter ion source (HICONEX-844) to produce negative carbon ions from elemental carbon samples, a Schenkel-type tandem accelerator of 3MV terminal voltage, an ion-beam analyzing apparatus with a chargeenergy selector and a couple of mass spectrometers, and a heavy-ion detector to identify and count ^\u003c14\u003eC^\u003c3+\u003e ions from various background ions. The ^\u003c14\u003eC/^\u003c13\u003eC ratio of a carbon sample is measured in comparison with that of a ^\u003c14\u003eC standard (NBS oxallic acid is usually used). The spectrometer has been used to measure ^\u003c14\u003eC concentrations of environmental carbon samples, as well as ^\u003c14\u003eC dates of geological and archeological materials. An automatic target changer, with a target disk that can be loaded with 28 sample targets at maximum, and can be controlled by a personal computer through GPIB interfacing, has been installed in the ion source of the spectrometer. A target mounted on the target disk of the changer can be moved in X-, Y-, and Z- direction, and rotated. The designed performances of positioning the targets, summerized in Table 2,have not attained yet. There seems to be some mechanical problems in controlling the target position with the target changer. The positioning of a selected sample is now performed by monitoring the current intensity of ^\u003c13\u003eC^- ions produced from the sample. Five hundred and eightly samples are measured in 1992,and totally 3557 samples in various fields have been analyzed since the installation of the spectrometer. The number of samples analyzed annually is increasing, by the introduction of the new target changer.", "subitem_description_type": "Abstract"}]}, "item_9_description_5": {"attribute_name": "\u5185\u5bb9\u8a18\u8ff0", "attribute_value_mlt": [{"subitem_description": "\u540d\u53e4\u5c4b\u5927\u5b66\u30bf\u30f3\u30c7\u30c8\u30ed\u30f3\u52a0\u901f\u5668\u8cea\u91cf\u5206\u6790\u8a08\u30b7\u30f3\u30dd\u30b8\u30a6\u30e0\u5831\u544a [\u30bf\u30f3\u30c7\u30c8\u30ed\u30f3\u52a0\u901f\u5668\u8cea\u91cf\u5206\u6790\u8a08\u3092\u7528\u3044\u305f14C\u5e74\u4ee3\u6e2c\u5b9a\u306e\u5229\u7528\u306b\u3088\u308b\u5730\u8cea\u5b66\uff65\u5730\u7406\u5b66\u7684\u7814\u7a76\u306e\u65b0\u5c55\u958b]\u3000Proceedings of Symposium on Tandetron Accelerator Mass Spectrometer, Nagoya University\\\n\u201cNew Developments in Geological and Geographical Studies by Using 14C dates with the Tandetron Accelerator Mass Spectrometer\u201d", "subitem_description_type": "Other"}]}, "item_9_identifier_registration": 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