--- title: CLLBC Scintillators High Resolution Gamma / Neutron Detectors date: 2024-12-21T07:53:44Z modified: 2026-02-26T04:33:50Z permalink: "https://www.berkeleynucleonics.com/cllbc-scintillators/" type: page status: publish excerpt: "" wpid: 18946 --- [ ![](https://www.berkeleynucleonics.com/wp-content/uploads/CONFIGURE-YOUR-SCINTILLATION-DETECTORS.png) ](/customize-your-scintillation-detector) [](https://www.berkeleynucleonics.com/wp-content/uploads/images/products/cllbc_gamma-neutron_scintillator_for_sprds_and_riids.png) ![High Resolution Gamma / Neutron Detectors](https://www.berkeleynucleonics.com/wp-content/uploads/images/products/cllbc_gamma-neutron_scintillator_for_sprds_and_riids.png) [](https://www.berkeleynucleonics.com/wp-content/uploads/cllbc_temp2.png) ![High Resolution Gamma / Neutron Detectors](https://www.berkeleynucleonics.com/wp-content/uploads/cllbc_temp2.png) - [ Quote ](/customize-your-scintillation-detector) - [ Contact ](/contact-us/) - [ Datasheet ](#technical-resources-section) #### CLLBC Scintillators High Resolution Gamma / Neutron Detectors The CLLBC (Cs₂LiLa(Br,Cl)₆:Ce) dual-mode scintillation crystal provides combined high-resolution gamma spectroscopy and neutron detection within a single detector volume. This eliminates the need for separate gamma and neutron sensors in applications requiring simultaneous measurement of both radiation types. ##### Key Properties of CLLBC Dual-Mode Scintillators - **Gamma Performance:** Energy resolution of 3% FWHM at 662 keV, supporting clear identification of gamma-ray sources. - N**eutron Detection:** Effective thermal neutron sensitivity through ⁶Li content, with clear discrimination from gamma events. - **Pulse Shape Discrimination (PSD):** Excellent gamma/neutron separation based on differences in scintillation decay times, enabling reliable identification in mixed radiation fields. - **Single-Crystal Solution:** Dual-mode capability reduces system complexity, size, and cost compared to using separate scintillators. CLLBC scintillators are hygroscopic and available encapsulated with an entrance window, coupled to light sensors (PMT or SiPM), or as complete detector assemblies including front-end electronics for PSD processing. ##### [Features](#features-section) ##### [Specifications](#specifications-section) ##### [Tech Resources](#technical-resources-section) ##### [Media](#media-section) ##### [Downloable Resources](#downloadable-section) ##### [Price List](#pricelist-section) ##### [FAQ](#faq-section) #### Overview Cesium Lanthanum Lithium BromoChloride (Cs2LiLaBr4.8Cl1.2:Ce) or CLLBC scintillators have similar properties to the well-known LaBr3:Ce material. Typical energy resolution for CLLBC scintillators is 3% FWHM for 662 keV. Due to the presence of Lithium however, CLLBC detectors can be used for Neutron detection in addition to high resolution gamma spectroscopy. The material features a sharp Neutron peak between 3.1 and 3.2 MeV. In addition CLLBC scintillators offer excellent neutron / gamma discrimination using PSD. #### Specifications **Density** 4.08 g / cc **Maximum Emission** 420 nm **Decay Time (typical)** 120 ns, 500 ns (average approx. 150 ns **Refractive Index** 1.90 **Photoelectron Yield Compared to NaI(Tl)** 70% (1.5 us shaping time) 84% (12 us shaping time) **Photons / MeV** Approximately 45,000 / MeV **Hygroscopic** Yes **6-Lithium Enrichment** 95% **Energy Resolution at 662 keV** < 3.5% FWHM (38×38 mm) ##### Typical Energy Resolution CLLBC vs. CeBr3 vs. NaI(Tl) **Energy (keV)** **CLLBC** **CeBr3** **NaI(Tl)** **30 keV (129-I)** 15% 20% 18% **59.5 keV (241-Am)** 10% 13% 11% **122 keV (57-Co)** 6.4% 8% 8.5% **662 keV (137-Cs)** 3.2% 4% 7% **1332 keV (60-Co)** 2.3% 3% 5.5% **2600 keV (Th-228)** 1.8% 2.5% 4% ##### CLLBC Graphs [ ![](https://www.berkeleynucleonics.com/wp-content/uploads/cllbc_graph_2.jpg) ](https://www.berkeleynucleonics.com/wp-content/uploads/cllbc_graph_2.jpg) [ ![](https://www.berkeleynucleonics.com/wp-content/uploads/cllbc_graph_1.jpg) ](https://www.berkeleynucleonics.com/wp-content/uploads/cllbc_graph_1.jpg) [ ![](https://www.berkeleynucleonics.com/wp-content/uploads/cllbc_graph_3.jpg) ](https://www.berkeleynucleonics.com/wp-content/uploads/cllbc_graph_3.jpg) [ ![](https://www.berkeleynucleonics.com/wp-content/uploads/cllbc_graph_4.jpg) ](https://www.berkeleynucleonics.com/wp-content/uploads/cllbc_graph_4.jpg) [ ![](https://www.berkeleynucleonics.com/wp-content/uploads/cllbc_graph_5.jpg) ](https://www.berkeleynucleonics.com/wp-content/uploads/cllbc_graph_5.jpg) #### Technical Resources [ Effects of Polarity on High Voltage Bias of Photomultipliers - Tech Note](https://www.berkeleynucleonics.com/download/23532/?tmstv=1778700934) [ CLLBC Scintillators High Resolution Gamma / Neutron Detectors](https://www.berkeleynucleonics.com/download/23622/?tmstv=1778700934) [ Press Room - Scintillation Detectors: Attenuation Length Of Optical Emission](https://www.berkeleynucleonics.com/download/23538/?tmstv=1778700934) [ Press Room - Dual Mode Scintillators: CLLBC And CLYC:CE](https://www.berkeleynucleonics.com/download/22874/?tmstv=1778700934) [ Press Room - Custom-Built Scintillation Detectors For Every Application](https://www.berkeleynucleonics.com/download/23544/?tmstv=1778700934) [ Press Room - Scintillator | What Are Scintillator Materials?](https://www.berkeleynucleonics.com/download/23550/?tmstv=1778700934) [ Press Room - From Crystal Growth To Assembly: The Manufacturing Process Of Custom Nal Scintillation Crystals](https://www.berkeleynucleonics.com/download/23556/?tmstv=1778700934) [ Press Room - Neutron Detectors and Their Performance](https://www.berkeleynucleonics.com/download/22493/?tmstv=1778700934) [ CLLBC Datasheet](https://www.berkeleynucleonics.com/download/23643/?tmstv=1778700934) #### Frequently Asked Questions (FAQ) #### Downloadable Resources Downloadable resources such as datasheets, firmware, software, drivers and products manuals. Alternatively, you can browse resources directly by visiting our [downloads page](/downloads). - [Product Datasheets](/downloads#scint-datasheets) - [Product Firmware](/downloads#scint-firmware) - [Product Software and Drivers](/downloads#scint-softwaredrivers) - [Product Manuals](/downloads#scint-manuals) #### Media ## Playlist ![An Interview with Paul Schotanus of SCIONIX HOLLAND](https://img.youtube.com/vi/qIFbrAGimTM/maxresdefault.jpg) #### An Interview with Paul Schotanus of SCIONIX HOLLAND 4:28 ![Customizing Your Scintillation Detector - Tradeoffs on Materials, Sizes and Components](https://img.youtube.com/vi/dB607ETP3kY/maxresdefault.jpg) #### Customizing Your Scintillation Detector – Tradeoffs on Materials, Sizes and Components 46:53 ![Berkeley Nucleonics | Low vs High-Resolution Detectors Webinar - Session 1](https://img.youtube.com/vi/kzq_ewh0xAw/maxresdefault.jpg) #### Berkeley Nucleonics | Low vs High-Resolution Detectors Webinar – Session 1 42:44 #### Price Lists [ Berkeley Nucleonics Price List 2026](https://www.berkeleynucleonics.com/download/19881/?tmstv=1778700934) [ ![](data:image/svg+xml;charset=utf-8,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' viewBox%3D'0 0 1500 138'%2F%3E) ](/customize-your-scintillation-detector)