{"id":6917,"date":"2019-03-15T08:34:18","date_gmt":"2019-03-15T08:34:18","guid":{"rendered":"http:\/\/iker.atomki.hu\/?page_id=6917"},"modified":"2019-03-15T09:51:52","modified_gmt":"2019-03-15T09:51:52","slug":"low-backround-gamma-and-beta-spectrometry-laboratory","status":"publish","type":"page","link":"https:\/\/iker.atomki.hu\/en\/low-backround-gamma-and-beta-spectrometry-laboratory\/","title":{"rendered":"Low-backround gamma- and beta-spectrometry laboratory"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text]<\/p>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading source=”post_title” font_container=”tag:h3|text_align:left” use_theme_fonts=”yes”][vc_text_separator title=”ICER” title_align=”separator_align_left” color=”custom” style=”dotted” border_width=”2″ css_animation=”right-to-left” accent_color=”#5eb3d2″][\/vc_column][\/vc_row][vc_row][vc_column 0=””][vc_row_inner 0=””][vc_column_inner 0=””][vc_column_text 0=””]This laboratory consists of two ultralow-background liquid scintillation counters (LSCs) and two ultralow-background gamma spectrometers, all of which are among the best of their kinds. The laboratory has been designed and configured for low-level and low-background activity measurements. The equipment in this facility can be used for the detection of gamma-emitters as well as pure-beta isotopes such as <\/b>3<\/sup><\/b><\/span>H, <\/b><\/span>14<\/sup><\/b><\/span>C, <\/b><\/span>36<\/sup><\/b><\/span>Cl, <\/b><\/span>90<\/sup><\/b><\/span>Sr, <\/b><\/span>99<\/sup><\/b><\/span>Tc with low detection limits. One of the possible applications is the tracing of the residue of the nuclear weapon tests and that of the Chernobyl NPP accident in sediment sequences.<\/b><\/span><\/span>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner css=”.vc_custom_1496336537824{margin-top: -8% !important;}”][vc_column_inner width=”1\/2″][vc_single_image image=”3275″ img_size=”large” css=”.vc_custom_1502884683938{margin-top: 0px !important;}”][\/vc_column_inner][vc_column_inner width=”1\/2″][vc_column_text 0=””]The HPGe detector of the Canberra-Packard made BE5030-7915-30ULB thin-windowed, broad-energy gamma-spectrometer<\/b> is situated in high-purity lead shielding. For sediment samples of about 10 g (dispersed in a thin layer), the detection efficiency of the natural fallout <\/span>210<\/sup><\/span>Pb is about 18%, while the Compton background in this region is around 0.3 cpm. This enables the quantification of 2-3 Bq\/kg excess <\/span>210<\/sup><\/span>Pb, compared to the <\/span>226<\/sup><\/span>Ra baseline. From the same measurement the MDA for the anthropogenic (e.g. nuclear weapon tests and Chernobyl NPP accident) fallout <\/span>241<\/sup><\/span>Am-re and <\/span>137<\/sup><\/span>Cs is around 1-2 Bq\/kg, in case of 36 hours counting time.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner][vc_column_inner width=”1\/2″ css=”.vc_custom_1502884861026{margin-top: -10% !important;}”][vc_single_image image=”2901″ img_size=”large”][\/vc_column_inner][vc_column_inner width=”1\/2″ css=”.vc_custom_1502884870690{margin-top: -10% !important;}”][vc_column_text]The Tri-Carb 3180 TR\/SL is a computer-controlled benchtop liquid scintillation counter <\/b>by Perkin-Elmer for\u00a0\u00a0 detecting small amounts of beta radioactivity with multi-parameter linear MCA. Special proprietary \u201cSurround TR-LSC\u201d BGO (Bismuth Germanium Oxide) detector guard surrounds the sample in the counting chamber, enhances discrimination against background and yields the\u00a0\u00a0 highest E<\/span>2<\/sup><\/span>\/B values available in\u00a0 a\u00a0 multipurpose liquid scintillation counting system. It is specially designed for counting extremely low activity samples in disposable glass and plastic vials. Background for\u00a0<\/span>3<\/sup><\/span>H and <\/span>14<\/sup><\/span>C is 1,0 \u2013 0,75 cpm and 0,3 cpm, respectively.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row css=”.vc_custom_1502884744804{margin-top: -5% !important;}”][vc_column css=”.vc_custom_1552639431059{margin-top: -5% !important;}”][vc_column_text]Super low level counting is available for extremely low activity beta samples, increasing system sensitivity (E<\/span>2<\/sup><\/span>\/B) to a factory test minimum of 880 for <\/span>3<\/sup><\/span>H and 6,000 for <\/span>14<\/sup><\/span>C. The detection limit for <\/span>3<\/sup><\/span>H without enrichment is \u2264 1 Bq\/l, in case of 500 minutes counting time.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column 0=””][vc_separator][vc_column_text 0=””]<\/span><\/p>\n

Related photo documentation<\/b><\/span><\/h4>\n

[\/vc_column_text][vc_masonry_grid post_type=”portfolio” max_items=”10″ element_width=”2″ gap=”5″ item=”mediaGrid_ScaleInWithIcon” grid_id=”vc_gid:1552643497096-259a0104-f1ff-9″ taxonomies=”60″][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

[vc_row][vc_column][vc_column_text] [\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading source=”post_title” font_container=”tag:h3|text_align:left” use_theme_fonts=”yes”][vc_text_separator title=”ICER” title_align=”separator_align_left” color=”custom” style=”dotted” border_width=”2″ css_animation=”right-to-left” accent_color=”#5eb3d2″][\/vc_column][\/vc_row][vc_row][vc_column 0=””][vc_row_inner 0=””][vc_column_inner 0=””][vc_column_text 0=””]This laboratory consists of two ultralow-background liquid scintillation counters (LSCs) and [\u2026]<\/span><\/p>\n","protected":false},"author":3,"featured_media":6958,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"jetpack_post_was_ever_published":false,"footnotes":""},"class_list":["post-6917","page","type-page","status-publish","has-post-thumbnail","hentry"],"jetpack_shortlink":"https:\/\/wp.me\/PaF6JY-1Nz","_links":{"self":[{"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/pages\/6917","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/comments?post=6917"}],"version-history":[{"count":8,"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/pages\/6917\/revisions"}],"predecessor-version":[{"id":6983,"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/pages\/6917\/revisions\/6983"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/media\/6958"}],"wp:attachment":[{"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/media?parent=6917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}