Geiger

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Definition

Proper noun A surname, most famously that of Hans Geiger, a German physicist. The name is intrinsically linked to the Geiger counter, a device for detecting and measuring ionizing radiation that he co-developed.

Usage Notes
  • Capitalization: As a proper noun, "Geiger" is always capitalized.
  • Primary Reference: In academic and scientific contexts, "Geiger" almost exclusively refers to Hans Geiger. The name is rarely used independently to mean the counter; the full term "Geiger counter" (or "Geiger-Müller counter") is used for the device.
  • Context is Key: When used alone, the word relies heavily on context to convey its meaning (e.g., a biography title "The Life of Geiger" vs. a lab note "Check with the Geiger").
Examples
  • Referring to the person:
    • The experiment's design was influenced by the earlier work of Geiger and Marsden.
    • Geiger's collaboration with Walther Müller led to a significant improvement in the radiation detector.
  • As part of the device name (the most common usage):
    • The scientist used a Geiger counter to measure the radiation levels in the sample.
    • We need to calibrate the Geiger-Müller tube before the survey.
Advanced / Technical Usage
  • Geiger-Müller Counter/Tube: The full technical name for the modern device, acknowledging the contribution of Walther Müller who refined Geiger's original design.
  • Geiger Region/Plateau: In physics, refers to the specific voltage range in which a Geiger-Müller tube operates correctly, characterized by a stable count rate despite changes in applied voltage.
Variants and Related Words
  • Geiger counter (n.): The common name for the radiation detection instrument.
  • Geiger-Müller counter (n.): The more precise technical term.
  • Geiger-Nuttall law (n.): A rule in nuclear physics relating the decay constant of a radioactive isotope to the energy of the alpha particles it emits, formulated by Hans Geiger and John Mitchell Nuttall.
Synonyms
  • For the person: Hans Geiger, Johannes Wilhelm "Hans" Geiger.
  • For the device: There is no true single-word synonym. Descriptive phrases include radiation detector, particle counter. The specific device is always referred to by its eponymous name.
Related Idioms or Phrases

There are no common idioms or phrasal verbs based on the word "Geiger." Its use is almost entirely technical or biographical.

Noun
  1. German physicist who developed the Geiger counter (1882-1945)

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