Researchers Propose New Way of Detecting Concealed Radioactive Material

Researchers at the University of Maryland have proposed a scheme for detecting a concealed source of radioactive material without searching containers one by one. Detection of radioactive material concealed in shipping containers is important in the early prevention of "dirty" bomb construction. The concept, described in the Journal of Applied Physics, is based on the gamma-ray emission from the radioactive material that would pass through the shipping container walls and ionize the surrounding air.

The facilitated breakdown of the air in a focused beam of high-power, coherent, terahertz or infrared radiation would then be an indicator of the presence of the radioactive material. The gamma rays coming through the container walls could be detected by a pulsed electromagnetic source of duration between 10 ns to microseconds.

The team evaluated several candidate sources for this detection, including a 670-GHz gyrotron oscillator with 200-kW, 10-µs output pulses and a TEA CO2 laser with 30-MW, 100-ns output pulses. A system based on the 670-GHz gyrotron would have enhanced sensitivity and a range exceeding 10 m.

Featured

  • AI to Help Resolve Non-Emergency Calls Across Utah and Decrease 911 Caller Wait Times

    The Utah Communications Authority (UCA), which oversees the state’s next generation 911 technology services, recently announced that public safety answering points (PSAPs) throughout the state plan to implement Motorola Solutions’ Virtual Response technology to automate the receipt and resolution of 10-digit non-emergency line calls in Utah with the help of AI. Read Now

  • Report: 2025 Video Surveillance Market Set to Grow After Small Decline in 2024

    Novaira Insights has unveiled its latest report, “World Market for Video Surveillance Hardware and Software – 2025 Edition.” The research indicates that the global market for video surveillance hardware and software experienced a slight decline of 0.3% in 2024. This performance fell short of previous forecasts, primarily due to a significant decrease of 7.8% in the Chinese market. Conversely, the rest of the world saw a growth of 4.9%. The global market for video surveillance equipment was estimated to be worth $25.0 billion in 2024. Read Now

  • Report Reveals Local Governments Face Surge in Ransomware Attacks with Minimal Resources

    KnowBe4, the cybersecurity platform that comprehensively addresses human risk management, recently released new research highlighting the critical cybersecurity challenges facing state, local, tribal, and territorial (SLTT) governments. The report details how government organizations have become prime targets for cybercriminals while simultaneously facing severe resource constraints. Read Now

  • Video Surveillance Trends to Watch

    With more organizations adding newer capabilities to their surveillance systems, it’s always important to remember the “basics” of system configuration and deployment, as well as the topline benefits of continually emerging technologies like AI and the cloud. Read Now

  • New Report Reveals Top Trends Transforming Access Controller Technology

    Mercury Security, a provider in access control hardware and open platform solutions, has published its Trends in Access Controllers Report, based on a survey of over 450 security professionals across North America and Europe. The findings highlight the controller’s vital role in a physical access control system (PACS), where the device not only enforces access policies but also connects with readers to verify user credentials—ranging from ID badges to biometrics and mobile identities. With 72% of respondents identifying the controller as a critical or important factor in PACS design, the report underscores how the choice of controller platform has become a strategic decision for today’s security leaders. Read Now

New Products

  • Compact IP Video Intercom

    Viking’s X-205 Series of intercoms provide HD IP video and two-way voice communication - all wrapped up in an attractive compact chassis.

  • QCS7230 System-on-Chip (SoC)

    QCS7230 System-on-Chip (SoC)

    The latest Qualcomm® Vision Intelligence Platform offers next-generation smart camera IoT solutions to improve safety and security across enterprises, cities and spaces. The Vision Intelligence Platform was expanded in March 2022 with the introduction of the QCS7230 System-on-Chip (SoC), which delivers superior artificial intelligence (AI) inferencing at the edge.

  • 4K Video Decoder

    3xLOGIC’s VH-DECODER-4K is perfect for use in organizations of all sizes in diverse vertical sectors such as retail, leisure and hospitality, education and commercial premises.